错误行：由以下原因引起：android.view.InflateException：二进制 XML 文件行 #19：二进制 XML 文件行 #10：错误膨胀 class
Error line: Caused by: android.view.InflateException: Binary XML file line #19: Binary XML file line #10: Error inflating class
我尝试在我的 android 工作室中做一个绘图应用程序，但是当我尝试 运行 在我的 Phone 或模拟器上运行它时。该应用程序突然 stops.Here 是我在 Layout 上的 content_main activity xml 文件的副本。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFCCCCCC"
android:orientation="vertical"
tools:context=".MainActivity">
<com.example.chadymaebarinan.drawingview
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:background="#FFFFFFFF" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_gravity="center"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/new_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/start_new"
android:src="@drawable/new_pic" />
<ImageButton
android:id="@+id/draw_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/brush"
android:src="@drawable/brush" />
<ImageButton
android:id="@+id/erase_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/erase"
android:src="@drawable/eraser" />
<ImageButton
android:id="@+id/save_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/save"
android:src="@drawable/save" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical">
<LinearLayout
android:id="@+id/paint_colors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF660000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:tag="#FF660000"
android:src="@drawable/paint"/>
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF0000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF0000" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF6600"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF6600" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFFCC00"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFFCC00" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF009900"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF009900" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF009999"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF009999" />
</LinearLayout>
<!-- Bottom Row -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF0000FF"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF0000FF" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF990099"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF990099" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF6666"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF6666" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFFFFFF"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFFFFFF" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF787878"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF787878" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF000000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF000000" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
这是我尝试 运行 模拟器
时的完整 LogCat 结果
03-20 14:16:47.259 2807-2807/? I/art: Not late-enabling -Xcheck:jni (already on)
03-20 14:16:47.259 2807-2807/? I/art: Late-enabling JIT
03-20 14:16:47.283 2807-2807/? I/art: JIT created with code_cache_capacity=2MB compile_threshold=1000
03-20 14:16:47.315 2807-2814/? E/art: Failed sending reply to debugger: Broken pipe
03-20 14:16:47.315 2807-2814/? I/art: Debugger is no longer active
03-20 14:16:47.321 2807-2807/? W/System: ClassLoader referenced unknown path: /data/app/com.example.chadymaebarinan.drawingview-2/lib/x86
03-20 14:16:47.355 2807-2807/? D/AndroidRuntime: Shutting down VM
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: FATAL EXCEPTION: main
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Process: com.example.chadymaebarinan.drawingview, PID: 2807
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chadymaebarinan.drawingview/com.example.chadymaebarina n.drawingview.MainActivity}: android.view.InflateException: Binary XML file line #19: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #19: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.chadymaebarinan.drawingview" on path: DexPathList[[zip file "/data/app/com.example.chadymaebarinan.drawingview- 2/base.apk"],nativeLibraryDirectories= [/data/app/com.example.chadymaebarinan.drawingview-2/lib/x86, /vendor/lib, /system/lib]]
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:583)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Suppressed: java.lang.ClassNotFoundException: com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.Class.classForName(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: ... 27 more
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
03-20 14:16:50.535 2807-2807/? I/Process: Sending signal. PID: 2807 SIG: 9
不知道如何修复此代码。我觉得跟我的布局文件有关系
<com.example.chadymaebarinan.drawingview
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:background="#FFFFFFFF" />
但是我不知道:(请告诉我如何修复错误。非常感谢！
更新：这是我的绘图视图class
包 com.example.chadymaebarinan.drawingview;
import android.content.Context;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.View;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.view.MotionEvent;
public class DrawingView extends View {
private Path drawPath;
//drawing and canvas paint
private Paint drawPaint, canvasPaint;
//initial color
private int paintColor = 0xFF660000;
//canvas
private Canvas drawCanvas;
//canvas bitmap
private Bitmap canvasBitmap;
public DrawingView(Context context, AttributeSet attrs){
super(context, attrs);
setupDrawing();
}
private void setupDrawing(){
drawPath = new Path();
drawPaint = new Paint();
drawPaint.setColor(paintColor);
drawPaint.setAntiAlias(true);
drawPaint.setStrokeWidth(20);
drawPaint.setStyle(Paint.Style.STROKE);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
canvasPaint = new Paint(Paint.DITHER_FLAG);
//get drawing area setup for interaction
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
//view given size
super.onSizeChanged(w, h, oldw, oldh);
canvasBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
drawCanvas = new Canvas(canvasBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
canvas.drawPath(drawPath, drawPaint);
//draw view
}
@Override
public boolean onTouchEvent(MotionEvent event) {
//detect user touch
float touchX = event.getX();
float touchY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
drawPath.moveTo(touchX, touchY);
break;
case MotionEvent.ACTION_MOVE:
drawPath.lineTo(touchX, touchY);
break;
case MotionEvent.ACTION_UP:
drawCanvas.drawPath(drawPath, drawPaint);
drawPath.reset();
break;
default:
return false;
}
invalidate();
return true;
}
public void setColor(String newColor){
invalidate();
paintColor = Color.parseColor(newColor);
drawPaint.setColor(paintColor);
//set color
}
}
尝试实现你的 class 的 3 个构造函数，而不是一个。
public DrawingView(Context context) {
super(context);
setupDrawing();
}
public DrawingView(Context context, AttributeSet attrs) {
super(context,attrs);
setupDrawing();
}
public DrawingView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setupDrawing();
}
如果没有帮助尝试调试 DrawingView class 代码。
您的 XML
上缺少 class 姓名
你的包名是com.example.chadymaebarinan.drawingview...所以你得到一个ClassNotFoundException。
更改 XML 以使用 DrawingView class 的全名。
<com.example.chadymaebarinan.drawingview.DrawingView
android:id="@+id/drawing"
android:layout_width="fill_parent"
我尝试在我的 android 工作室中做一个绘图应用程序，但是当我尝试 运行 在我的 Phone 或模拟器上运行它时。该应用程序突然 stops.Here 是我在 Layout 上的 content_main activity xml 文件的副本。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFCCCCCC"
android:orientation="vertical"
tools:context=".MainActivity">
<com.example.chadymaebarinan.drawingview
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:background="#FFFFFFFF" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_gravity="center"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/new_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/start_new"
android:src="@drawable/new_pic" />
<ImageButton
android:id="@+id/draw_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/brush"
android:src="@drawable/brush" />
<ImageButton
android:id="@+id/erase_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/erase"
android:src="@drawable/eraser" />
<ImageButton
android:id="@+id/save_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:contentDescription="@string/save"
android:src="@drawable/save" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical">
<LinearLayout
android:id="@+id/paint_colors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF660000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:tag="#FF660000"
android:src="@drawable/paint"/>
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF0000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF0000" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF6600"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF6600" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFFCC00"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFFCC00" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF009900"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF009900" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF009999"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF009999" />
</LinearLayout>
<!-- Bottom Row -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF0000FF"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF0000FF" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF990099"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF990099" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFF6666"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFF6666" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FFFFFFFF"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FFFFFFFF" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF787878"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF787878" />
<ImageButton
android:layout_width="@dimen/large_brush"
android:layout_height="@dimen/large_brush"
android:layout_margin="2dp"
android:background="#FF000000"
android:contentDescription="@string/paint"
android:onClick="paintClicked"
android:src="@drawable/paint"
android:tag="#FF000000" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
这是我尝试 运行 模拟器
时的完整 LogCat 结果03-20 14:16:47.259 2807-2807/? I/art: Not late-enabling -Xcheck:jni (already on)
03-20 14:16:47.259 2807-2807/? I/art: Late-enabling JIT
03-20 14:16:47.283 2807-2807/? I/art: JIT created with code_cache_capacity=2MB compile_threshold=1000
03-20 14:16:47.315 2807-2814/? E/art: Failed sending reply to debugger: Broken pipe
03-20 14:16:47.315 2807-2814/? I/art: Debugger is no longer active
03-20 14:16:47.321 2807-2807/? W/System: ClassLoader referenced unknown path: /data/app/com.example.chadymaebarinan.drawingview-2/lib/x86
03-20 14:16:47.355 2807-2807/? D/AndroidRuntime: Shutting down VM
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: FATAL EXCEPTION: main
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Process: com.example.chadymaebarinan.drawingview, PID: 2807
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chadymaebarinan.drawingview/com.example.chadymaebarina n.drawingview.MainActivity}: android.view.InflateException: Binary XML file line #19: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #19: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.chadymaebarinan.drawingview" on path: DexPathList[[zip file "/data/app/com.example.chadymaebarinan.drawingview- 2/base.apk"],nativeLibraryDirectories= [/data/app/com.example.chadymaebarinan.drawingview-2/lib/x86, /vendor/lib, /system/lib]]
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createView(LayoutInflater.java:583)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.example.chadymaebarinan.drawingview.MainActivity.onCreate(MainActivity.java:28)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Suppressed: java.lang.ClassNotFoundException: com.example.chadymaebarinan.drawingview
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.Class.classForName(Native Method)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: ... 27 more
03-20 14:16:47.355 2807-2807/? E/AndroidRuntime: Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
03-20 14:16:50.535 2807-2807/? I/Process: Sending signal. PID: 2807 SIG: 9
不知道如何修复此代码。我觉得跟我的布局文件有关系
<com.example.chadymaebarinan.drawingview
android:id="@+id/drawing"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_marginTop="3dp"
android:layout_weight="1"
android:background="#FFFFFFFF" />
但是我不知道:(请告诉我如何修复错误。非常感谢！
更新：这是我的绘图视图class
包 com.example.chadymaebarinan.drawingview;
import android.content.Context;
import android.graphics.Color;
import android.util.AttributeSet;
import android.view.View;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.view.MotionEvent;
public class DrawingView extends View {
private Path drawPath;
//drawing and canvas paint
private Paint drawPaint, canvasPaint;
//initial color
private int paintColor = 0xFF660000;
//canvas
private Canvas drawCanvas;
//canvas bitmap
private Bitmap canvasBitmap;
public DrawingView(Context context, AttributeSet attrs){
super(context, attrs);
setupDrawing();
}
private void setupDrawing(){
drawPath = new Path();
drawPaint = new Paint();
drawPaint.setColor(paintColor);
drawPaint.setAntiAlias(true);
drawPaint.setStrokeWidth(20);
drawPaint.setStyle(Paint.Style.STROKE);
drawPaint.setStrokeJoin(Paint.Join.ROUND);
drawPaint.setStrokeCap(Paint.Cap.ROUND);
canvasPaint = new Paint(Paint.DITHER_FLAG);
//get drawing area setup for interaction
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
//view given size
super.onSizeChanged(w, h, oldw, oldh);
canvasBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
drawCanvas = new Canvas(canvasBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint);
canvas.drawPath(drawPath, drawPaint);
//draw view
}
@Override
public boolean onTouchEvent(MotionEvent event) {
//detect user touch
float touchX = event.getX();
float touchY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
drawPath.moveTo(touchX, touchY);
break;
case MotionEvent.ACTION_MOVE:
drawPath.lineTo(touchX, touchY);
break;
case MotionEvent.ACTION_UP:
drawCanvas.drawPath(drawPath, drawPaint);
drawPath.reset();
break;
default:
return false;
}
invalidate();
return true;
}
public void setColor(String newColor){
invalidate();
paintColor = Color.parseColor(newColor);
drawPaint.setColor(paintColor);
//set color
}
}
尝试实现你的 class 的 3 个构造函数，而不是一个。
public DrawingView(Context context) {
super(context);
setupDrawing();
}
public DrawingView(Context context, AttributeSet attrs) {
super(context,attrs);
setupDrawing();
}
public DrawingView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setupDrawing();
}
如果没有帮助尝试调试 DrawingView class 代码。
您的 XML
上缺少 class 姓名你的包名是com.example.chadymaebarinan.drawingview...所以你得到一个ClassNotFoundException。
更改 XML 以使用 DrawingView class 的全名。
<com.example.chadymaebarinan.drawingview.DrawingView
android:id="@+id/drawing"
android:layout_width="fill_parent"