在 Android 中单击 ImageView 时显示 FC 错误
Show FC error when click on ImageView in Android
我想在点击 ImageView
后在 imageview
中显示图像。我使用 Fragment 来显示内容,我需要在 Dialog
中显示大图。但是当点击 ImageView
时显示 FC 错误。
我的片段代码:
public class root_mobile_fragment extends Fragment {
Bundle savedInstanceState;
private CardView mobile_dl;
private ImageView mobile_iamge1;
Context context;
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.root_mobile_xml, container, false);
mobile_dl = (CardView) view.findViewById(R.id.mobile_adApp);
mobile_dl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent browserIntent = new Intent(Intent.ACTION_VIEW,
Uri.parse("https://soft-mgyun-com.qcloudcdn.com/files/products/romastersu/2075/2016/70/RomasterSu_3.0.0_160104_2075.apk"));
startActivity(browserIntent);
}
});
mobile_iamge1 = (ImageView) view.findViewById(R.id.mobile_root_image1);
mobile_iamge1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final Dialog dialog = new Dialog(getActivity());
LayoutInflater inflater2 = LayoutInflater.from(getActivity());
View newView = (View) inflater2.inflate(R.layout.image_dialog, null);
ImageView image_2 = (ImageView) newView.findViewById(R.id.mobile_root_image1);
image_2.setImageResource(R.drawable.iroot_1);
dialog.show();
}
});
return view;
}
}
图片布局XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mobile_image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_margin="5dp"
android:adjustViewBounds="true"
android:background="@color/white"
android:foreground="?android:attr/selectableItemBackground">
<ImageView
android:id="@+id/image_dialog_big"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
</android.support.v7.widget.CardView>
</RelativeLayout>
FC 错误:
01-15 15:08:09.174 16981-16981/com.aria_data_service.appsuite E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.aria_data_service.appsuite, PID: 16981
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageResource(int)' on a null object reference
at com.aria_data_service.appsuite.fragments.root_mobile_fragment.onClick(root_mobile_fragment.java:56)
at android.view.View.performClick(View.java:4764)
at android.view.View$PerformClick.run(View.java:19844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
我该如何解决? tnx 全部 <3
我认为您在对话框中为 ImageView
使用了错误的 id
。
你有
<ImageView
android:id="@+id/image_dialog_big"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
在您的 xml 中,但您在 java 代码中使用 R.id.mobile_root_image1
来访问 ImageView
并且它导致 NullPointerException
正如您在 logcat输出。
改变
ImageView image_2 = (ImageView)newView.findViewById(R.id.mobile_root_image1);
到
ImageView image_2 = (ImageView) newView.findViewById(R.id.image_dialog_big);
在您的 activity
中替换此行
mobile_iamge1 = (ImageView) view.findViewById(R.id.mobile_root_image1);
和
mobile_iamge1 = (ImageView) view.findViewById(R.id.image_dialog_big);
用它来显示对话框
在你的 onclick 中试试这个
final Dialog dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.image_dialog);
ImageView image_2 =(ImageView) dialog.findViewById(R.id.mobile_root_image1);
image_2.setImageResource(R.drawable.iroot_1);
});
dialog.show();
并确保 image_dialog xml 文件包含 mobile_root_image1 作为图像视图的 ID
我想在点击 ImageView
后在 imageview
中显示图像。我使用 Fragment 来显示内容,我需要在 Dialog
中显示大图。但是当点击 ImageView
时显示 FC 错误。
我的片段代码:
public class root_mobile_fragment extends Fragment {
Bundle savedInstanceState;
private CardView mobile_dl;
private ImageView mobile_iamge1;
Context context;
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.root_mobile_xml, container, false);
mobile_dl = (CardView) view.findViewById(R.id.mobile_adApp);
mobile_dl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent browserIntent = new Intent(Intent.ACTION_VIEW,
Uri.parse("https://soft-mgyun-com.qcloudcdn.com/files/products/romastersu/2075/2016/70/RomasterSu_3.0.0_160104_2075.apk"));
startActivity(browserIntent);
}
});
mobile_iamge1 = (ImageView) view.findViewById(R.id.mobile_root_image1);
mobile_iamge1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final Dialog dialog = new Dialog(getActivity());
LayoutInflater inflater2 = LayoutInflater.from(getActivity());
View newView = (View) inflater2.inflate(R.layout.image_dialog, null);
ImageView image_2 = (ImageView) newView.findViewById(R.id.mobile_root_image1);
image_2.setImageResource(R.drawable.iroot_1);
dialog.show();
}
});
return view;
}
}
图片布局XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mobile_image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_margin="5dp"
android:adjustViewBounds="true"
android:background="@color/white"
android:foreground="?android:attr/selectableItemBackground">
<ImageView
android:id="@+id/image_dialog_big"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
</android.support.v7.widget.CardView>
</RelativeLayout>
FC 错误:
01-15 15:08:09.174 16981-16981/com.aria_data_service.appsuite E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.aria_data_service.appsuite, PID: 16981
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageResource(int)' on a null object reference
at com.aria_data_service.appsuite.fragments.root_mobile_fragment.onClick(root_mobile_fragment.java:56)
at android.view.View.performClick(View.java:4764)
at android.view.View$PerformClick.run(View.java:19844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
我该如何解决? tnx 全部 <3
我认为您在对话框中为 ImageView
使用了错误的 id
。
你有
<ImageView
android:id="@+id/image_dialog_big"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
在您的 xml 中,但您在 java 代码中使用 R.id.mobile_root_image1
来访问 ImageView
并且它导致 NullPointerException
正如您在 logcat输出。
改变
ImageView image_2 = (ImageView)newView.findViewById(R.id.mobile_root_image1);
到
ImageView image_2 = (ImageView) newView.findViewById(R.id.image_dialog_big);
在您的 activity
中替换此行mobile_iamge1 = (ImageView) view.findViewById(R.id.mobile_root_image1);
和
mobile_iamge1 = (ImageView) view.findViewById(R.id.image_dialog_big);
用它来显示对话框
在你的 onclick 中试试这个
final Dialog dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.image_dialog);
ImageView image_2 =(ImageView) dialog.findViewById(R.id.mobile_root_image1);
image_2.setImageResource(R.drawable.iroot_1);
});
dialog.show();
并确保 image_dialog xml 文件包含 mobile_root_image1 作为图像视图的 ID