想在我的 Android 应用程序中实现 'screenshot' 函数和 'share' 选项，但抛出错误
Would like to implement 'screenshot' function and 'share' option in my Android app, but throwing error
我正在构建一个 android 应用程序，并希望在单击共享按钮时在我的 Android 应用程序中实现 'screenshot' 功能和“共享”选项。
但是当 运行 它抛出以下错误并且点击按钮时没有任何反应。请帮忙！
尝试加载暂存凭证时出错：java.lang.NullPointerException：尝试在空对象引用
上调用虚拟方法'java.lang.String android.os.Bundle.getString(java.lang.String)'
代码如下：
public class ShareActivity extends MainActivity{
Button share;
File imagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
share = (Button)findViewById(R.id.share1);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bitmap bitmap = takeScreenshot();
saveBitmap(bitmap);
shareIt();
}
});
}
//Screenshot method to take the screenshot in app
public Bitmap takeScreenshot() {
View rootView = getWindow().getDecorView().findViewById(android.R.id.content);
//View rootView = findViewById(android.R.id.content).getRootView();
//rootView.setDrawingCacheEnabled(true);
//return rootView.getDrawingCache();
//View screenView = view.getRootView();
rootView.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(rootView.getDrawingCache());
rootView.setDrawingCacheEnabled(false);
return bitmap;
}
public void saveBitmap(Bitmap bitmap) {
imagePath = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+ "/screenshot.png");
FileOutputStream fos;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.e("GREC", e.getMessage(), e);
} catch (IOException e) {
Log.e("GREC", e.getMessage(), e);
}
}
//ShareIt method to invoke the share the screen shot captured
private void shareIt() {
Uri uri = Uri.fromFile(imagePath);
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
Intent intent = this.getIntent();
Bundle bundle= getIntent().getExtras();
sharingIntent = intent.setType("image/*");
//sharingIntent.setType("image/*");
String shareBody = "In Tweecher, My highest score with screen shot";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "My Tweecher score");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
}
}
堆栈跟踪日志：
09-14 21:25:21.470 2844-2844/com.mycompany.myfirstglapp I/art: Not late-enabling -Xcheck:jni (already on)
09-14 21:25:21.881 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Telemetry initialize() called...
09-14 21:25:21.883 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Right before Telemetry set enabled in initialized()
09-14 21:25:21.888 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: setTelemetryEnabled(); this.telemetryEnabled = false; telemetryEnabled = true
09-14 21:25:21.888 2844-2844/com.mycompany.myfirstglapp D/MapboxEventManager: Starting Telemetry Up!
09-14 21:25:21.921 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Permissions are good, see if GPS is enabled and if not then setup Ambient.
09-14 21:25:21.923 2844-2844/com.mycompany.myfirstglapp E/MapboxEventManager: Error Trying to load Staging Credentials: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
09-14 21:25:21.996 2844-2844/com.mycompany.myfirstglapp W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
09-14 21:25:22.263 2844-2844/com.mycompany.myfirstglapp I/art: Thread[1,tid=2844,Native,Thread*=0xb40f4500,peer=0x73828258,"main"] recursive attempt to load library "/data/app/com.mycompany.myfirstglapp-2/lib/x86/libmapbox-gl.so"
09-14 21:25:22.263 2844-2844/com.mycompany.myfirstglapp I/art: Thread[1,tid=2844,Native,Thread*=0xb40f4500,peer=0x73828258,"main"] recursive attempt to load library "/data/app/com.mycompany.myfirstglapp-2/lib/x86/libmapbox-gl.so"
09-14 21:25:22.294 2844-2844/com.mycompany.myfirstglapp E/OfflineManager: Failed to read the storage key: Attempt to invoke virtual method 'boolean android.os.Bundle.getBoolean(java.lang.String, boolean)' on a null object reference
09-14 21:25:22.359 2844-2844/com.mycompany.myfirstglapp I/com.mapbox.mapboxsdk.maps.MapView: MapView start Telemetry...
09-14 21:25:22.360 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Telemetry initialize() called...
09-14 21:25:22.360 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Mapbox Telemetry has already been initialized.
[ 09-14 21:25:22.361 2844: 2844 D/ ]
HostConnection::get() New Host Connection established 0xaaabfdc0, tid 2844
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Vendor: Android
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Version: 1.4 Android META-EGL
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Client APIs: OpenGL_ES
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Client Extensions: EGL_KHR_get_all_proc_addresses EGL_ANDROID_presentation_time EGL_KHR_swap_buffers_with_damage EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_fence_sync EGL_ANDROID_image_native_buffer
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp W/mbgl: {ny.myfirstglapp}[Android]: In emulator! Enabling hacks :-(
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Found 2 configs
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Config 0:
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Caveat: 12344
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Conformant: 5
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Color: 32
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Red: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Green: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Blue: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha mask: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Depth: 24
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Stencil: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Sample buffers: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Samples: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Config 1:
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Caveat: 12344
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Conformant: 5
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Color: 32
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Red: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Green: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Blue: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha mask: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Depth: 24
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Stencil: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Sample buffers: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Samples: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Chosen config is 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Chosen window format is 1
09-14 21:25:22.401 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: flushEventsQueueImmediately() called...
09-14 21:25:22.403 2844-2844/com.mycompany.myfirstglapp D/MapboxEventManager: turnstile event pushed.
09-14 21:25:22.419 2844-2844/com.mycompany.myfirstglapp D/Network: Network
09-14 21:25:22.422 2844-2844/com.mycompany.myfirstglapp D/GPS Enabled: GPS Enabled
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Context.checkPermission(java.lang.String, int, int)' on a null object reference
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.content.ContextWrapper.checkPermission(ContextWrapper.java:637)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.support.v4.content.ContextCompat.checkSelfPermission(ContextCompat.java:387)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.GPSTracker.getLocation(GPSTracker.java:133)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.GPSTracker.<init>(GPSTracker.java:62)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.MainActivity.onCreate(MainActivity.java:102)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.Activity.performCreate(Activity.java:6237)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.-wrap11(ActivityThread.java)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.os.Looper.loop(Looper.java:148)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5417)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at java.lang.reflect.Method.invoke(Native Method)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
09-14 21:25:22.446 2844-2872/com.mycompany.myfirstglapp D/GzipRequestInterceptor: Compressing
09-14 21:25:22.450 2844-2877/com.mycompany.myfirstglapp D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
09-14 21:25:22.456 2844-2844/com.mycompany.myfirstglapp I/TelemetryService: onCreate() called
09-14 21:25:22.456 2844-2844/com.mycompany.myfirstglapp I/TelemetryService: onStartCommand() called
09-14 21:25:22.582 2844-2877/com.mycompany.myfirstglapp I/OpenGLRenderer: Initialized EGL, version 1.4
[ 09-14 21:25:22.583 2844: 2877 D/ ]
HostConnection::get() New Host Connection established 0xaa142310, tid 2877
09-14 21:25:22.699 2844-2877/com.mycompany.myfirstglapp W/EGL_emulation: eglSurfaceAttrib not implemented
09-14 21:25:22.699 2844-2877/com.mycompany.myfirstglapp W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa0453360, error=EGL_SUCCESS
[ 09-14 21:25:22.705 2878: 2903 D/ ]
HostConnection::get() New Host Connection established 0xae4d28d0, tid 2903
09-14 21:25:22.829 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Vendor: Google (Intel)
09-14 21:25:22.829 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Renderer: Android Emulator OpenGL ES Translator (Intel(R) HD Graphics 2000)
09-14 21:25:22.830 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Version: OpenGL ES 2.0 (3.1.0 - Build 9.17.10.4229)
09-14 21:25:22.830 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Extensions: GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint GL_OES_texture_float GL_OES_texture_float_linear GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_packed_depth_stencil GL_OES_vertex_half_float GL_OES_texture_npot GL_OES_rgb8_rgba8 ANDROID_EMU_CHECKSUM_HELPER_v1
09-14 21:25:22.894 2844-2844/com.mycompany.myfirstglapp I/MapAsync: is called
09-14 21:25:23.208 2844-2854/com.mycompany.myfirstglapp I/art: Background partial concurrent mark sweep GC freed 7816(378KB) AllocSpace objects, 0(0B) LOS objects, 39% free, 5MB/9MB, paused 9.556ms total 19.844ms
09-14 21:25:23.290 2844-2854/com.mycompany.myfirstglapp W/art: Suspending all threads took: 81.700ms
09-14 21:25:23.315 2844-2844/com.mycompany.myfirstglapp W/mbgl: {ny.myfirstglapp}[OpenGL]: Not using Vertex Array Objects
09-14 21:25:23.609 2844-2844/com.mycompany.myfirstglapp I/Choreographer: Skipped 45 frames! The application may be doing too much work on its main thread.
09-14 21:25:23.809 2844-2923/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:23.811 2844-2872/com.mycompany.myfirstglapp D/MapboxEventManager: response code = 204 for events 2
09-14 21:25:24.072 2844-2935/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.200 2844-2934/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.237 2844-2923/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.447 2844-2911/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:24.502 2844-2935/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.525 2844-2892/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:24.541 2844-2913/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:31.922 2844-3063/com.mycompany.myfirstglapp D/MapboxEventManager: No events in the queue to send so returning.
您从日志 cat 中发布的唯一堆栈跟踪是错误
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Context.checkPermission(java.lang.String, int, int)' on a null object reference
当你往下看几行时，你会看到
at com.mycompany.myfirstglapp.GPSTracker.getLocation(GPSTracker.java:133)
这意味着错误的发生是由于GPSTracker.java中第133行的某些内容。这是在 GPSTracker class 的 getLocation() 方法中。您需要查看这行代码并使用调试器来确定该行代码中的哪个变量是null。由于堆栈跟踪显示调用堆栈中的其他方法，很可能问题出在您传递给 getLocation() 方法的参数之一。
我正在构建一个 android 应用程序，并希望在单击共享按钮时在我的 Android 应用程序中实现 'screenshot' 功能和“共享”选项。
但是当 运行 它抛出以下错误并且点击按钮时没有任何反应。请帮忙！
尝试加载暂存凭证时出错：java.lang.NullPointerException：尝试在空对象引用
上调用虚拟方法'java.lang.String android.os.Bundle.getString(java.lang.String)'代码如下：
public class ShareActivity extends MainActivity{
Button share;
File imagePath;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
share = (Button)findViewById(R.id.share1);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bitmap bitmap = takeScreenshot();
saveBitmap(bitmap);
shareIt();
}
});
}
//Screenshot method to take the screenshot in app
public Bitmap takeScreenshot() {
View rootView = getWindow().getDecorView().findViewById(android.R.id.content);
//View rootView = findViewById(android.R.id.content).getRootView();
//rootView.setDrawingCacheEnabled(true);
//return rootView.getDrawingCache();
//View screenView = view.getRootView();
rootView.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(rootView.getDrawingCache());
rootView.setDrawingCacheEnabled(false);
return bitmap;
}
public void saveBitmap(Bitmap bitmap) {
imagePath = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+ "/screenshot.png");
FileOutputStream fos;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.e("GREC", e.getMessage(), e);
} catch (IOException e) {
Log.e("GREC", e.getMessage(), e);
}
}
//ShareIt method to invoke the share the screen shot captured
private void shareIt() {
Uri uri = Uri.fromFile(imagePath);
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
Intent intent = this.getIntent();
Bundle bundle= getIntent().getExtras();
sharingIntent = intent.setType("image/*");
//sharingIntent.setType("image/*");
String shareBody = "In Tweecher, My highest score with screen shot";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "My Tweecher score");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
}
}
堆栈跟踪日志：
09-14 21:25:21.470 2844-2844/com.mycompany.myfirstglapp I/art: Not late-enabling -Xcheck:jni (already on)
09-14 21:25:21.881 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Telemetry initialize() called...
09-14 21:25:21.883 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Right before Telemetry set enabled in initialized()
09-14 21:25:21.888 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: setTelemetryEnabled(); this.telemetryEnabled = false; telemetryEnabled = true
09-14 21:25:21.888 2844-2844/com.mycompany.myfirstglapp D/MapboxEventManager: Starting Telemetry Up!
09-14 21:25:21.921 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Permissions are good, see if GPS is enabled and if not then setup Ambient.
09-14 21:25:21.923 2844-2844/com.mycompany.myfirstglapp E/MapboxEventManager: Error Trying to load Staging Credentials: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference
09-14 21:25:21.996 2844-2844/com.mycompany.myfirstglapp W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
09-14 21:25:22.263 2844-2844/com.mycompany.myfirstglapp I/art: Thread[1,tid=2844,Native,Thread*=0xb40f4500,peer=0x73828258,"main"] recursive attempt to load library "/data/app/com.mycompany.myfirstglapp-2/lib/x86/libmapbox-gl.so"
09-14 21:25:22.263 2844-2844/com.mycompany.myfirstglapp I/art: Thread[1,tid=2844,Native,Thread*=0xb40f4500,peer=0x73828258,"main"] recursive attempt to load library "/data/app/com.mycompany.myfirstglapp-2/lib/x86/libmapbox-gl.so"
09-14 21:25:22.294 2844-2844/com.mycompany.myfirstglapp E/OfflineManager: Failed to read the storage key: Attempt to invoke virtual method 'boolean android.os.Bundle.getBoolean(java.lang.String, boolean)' on a null object reference
09-14 21:25:22.359 2844-2844/com.mycompany.myfirstglapp I/com.mapbox.mapboxsdk.maps.MapView: MapView start Telemetry...
09-14 21:25:22.360 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Telemetry initialize() called...
09-14 21:25:22.360 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: Mapbox Telemetry has already been initialized.
[ 09-14 21:25:22.361 2844: 2844 D/ ]
HostConnection::get() New Host Connection established 0xaaabfdc0, tid 2844
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Vendor: Android
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Version: 1.4 Android META-EGL
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Client APIs: OpenGL_ES
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: EGL Client Extensions: EGL_KHR_get_all_proc_addresses EGL_ANDROID_presentation_time EGL_KHR_swap_buffers_with_damage EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_fence_sync EGL_ANDROID_image_native_buffer
09-14 21:25:22.387 2844-2844/com.mycompany.myfirstglapp W/mbgl: {ny.myfirstglapp}[Android]: In emulator! Enabling hacks :-(
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Found 2 configs
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Config 0:
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Caveat: 12344
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Conformant: 5
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Color: 32
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Red: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Green: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Blue: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha mask: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Depth: 24
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Stencil: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Sample buffers: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Samples: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Config 1:
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Caveat: 12344
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Conformant: 5
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Color: 32
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Red: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Green: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Blue: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Alpha mask: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Depth: 24
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Stencil: 8
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Sample buffers: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: ...Samples: 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Chosen config is 0
09-14 21:25:22.388 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: Chosen window format is 1
09-14 21:25:22.401 2844-2844/com.mycompany.myfirstglapp I/MapboxEventManager: flushEventsQueueImmediately() called...
09-14 21:25:22.403 2844-2844/com.mycompany.myfirstglapp D/MapboxEventManager: turnstile event pushed.
09-14 21:25:22.419 2844-2844/com.mycompany.myfirstglapp D/Network: Network
09-14 21:25:22.422 2844-2844/com.mycompany.myfirstglapp D/GPS Enabled: GPS Enabled
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Context.checkPermission(java.lang.String, int, int)' on a null object reference
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.content.ContextWrapper.checkPermission(ContextWrapper.java:637)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.support.v4.content.ContextCompat.checkSelfPermission(ContextCompat.java:387)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.GPSTracker.getLocation(GPSTracker.java:133)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.GPSTracker.<init>(GPSTracker.java:62)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.mycompany.myfirstglapp.MainActivity.onCreate(MainActivity.java:102)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.Activity.performCreate(Activity.java:6237)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.-wrap11(ActivityThread.java)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
09-14 21:25:22.434 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.os.Looper.loop(Looper.java:148)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5417)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at java.lang.reflect.Method.invoke(Native Method)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
09-14 21:25:22.435 2844-2844/com.mycompany.myfirstglapp W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
09-14 21:25:22.446 2844-2872/com.mycompany.myfirstglapp D/GzipRequestInterceptor: Compressing
09-14 21:25:22.450 2844-2877/com.mycompany.myfirstglapp D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
09-14 21:25:22.456 2844-2844/com.mycompany.myfirstglapp I/TelemetryService: onCreate() called
09-14 21:25:22.456 2844-2844/com.mycompany.myfirstglapp I/TelemetryService: onStartCommand() called
09-14 21:25:22.582 2844-2877/com.mycompany.myfirstglapp I/OpenGLRenderer: Initialized EGL, version 1.4
[ 09-14 21:25:22.583 2844: 2877 D/ ]
HostConnection::get() New Host Connection established 0xaa142310, tid 2877
09-14 21:25:22.699 2844-2877/com.mycompany.myfirstglapp W/EGL_emulation: eglSurfaceAttrib not implemented
09-14 21:25:22.699 2844-2877/com.mycompany.myfirstglapp W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa0453360, error=EGL_SUCCESS
[ 09-14 21:25:22.705 2878: 2903 D/ ]
HostConnection::get() New Host Connection established 0xae4d28d0, tid 2903
09-14 21:25:22.829 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Vendor: Google (Intel)
09-14 21:25:22.829 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Renderer: Android Emulator OpenGL ES Translator (Intel(R) HD Graphics 2000)
09-14 21:25:22.830 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Version: OpenGL ES 2.0 (3.1.0 - Build 9.17.10.4229)
09-14 21:25:22.830 2844-2844/com.mycompany.myfirstglapp I/mbgl: {ny.myfirstglapp}[OpenGL]: GL Extensions: GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint GL_OES_texture_float GL_OES_texture_float_linear GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_packed_depth_stencil GL_OES_vertex_half_float GL_OES_texture_npot GL_OES_rgb8_rgba8 ANDROID_EMU_CHECKSUM_HELPER_v1
09-14 21:25:22.894 2844-2844/com.mycompany.myfirstglapp I/MapAsync: is called
09-14 21:25:23.208 2844-2854/com.mycompany.myfirstglapp I/art: Background partial concurrent mark sweep GC freed 7816(378KB) AllocSpace objects, 0(0B) LOS objects, 39% free, 5MB/9MB, paused 9.556ms total 19.844ms
09-14 21:25:23.290 2844-2854/com.mycompany.myfirstglapp W/art: Suspending all threads took: 81.700ms
09-14 21:25:23.315 2844-2844/com.mycompany.myfirstglapp W/mbgl: {ny.myfirstglapp}[OpenGL]: Not using Vertex Array Objects
09-14 21:25:23.609 2844-2844/com.mycompany.myfirstglapp I/Choreographer: Skipped 45 frames! The application may be doing too much work on its main thread.
09-14 21:25:23.809 2844-2923/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:23.811 2844-2872/com.mycompany.myfirstglapp D/MapboxEventManager: response code = 204 for events 2
09-14 21:25:24.072 2844-2935/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.200 2844-2934/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.237 2844-2923/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.447 2844-2911/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:24.502 2844-2935/com.mycompany.myfirstglapp V/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request was successful (code = 200).
09-14 21:25:24.525 2844-2892/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:24.541 2844-2913/com.mycompany.myfirstglapp D/com.mapbox.mapboxsdk.http.HTTPRequest: [HTTP] Request with response code = 304: Not Modified
09-14 21:25:31.922 2844-3063/com.mycompany.myfirstglapp D/MapboxEventManager: No events in the queue to send so returning.
您从日志 cat 中发布的唯一堆栈跟踪是错误
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.content.Context.checkPermission(java.lang.String, int, int)' on a null object reference
当你往下看几行时，你会看到
at com.mycompany.myfirstglapp.GPSTracker.getLocation(GPSTracker.java:133)
这意味着错误的发生是由于GPSTracker.java中第133行的某些内容。这是在 GPSTracker class 的 getLocation() 方法中。您需要查看这行代码并使用调试器来确定该行代码中的哪个变量是null。由于堆栈跟踪显示调用堆栈中的其他方法，很可能问题出在您传递给 getLocation() 方法的参数之一。