【发布时间】：2014-02-12 09:22:24
【问题描述】：
当我连续单击捕获按钮（没有任何中断）时，出现运行时异常 我该如何解决这个问题？
如果不可能，我该如何处理这个异常？
btnCapture = (ImageButton) findViewById(R.id.btnCapture);
final MediaPlayer mp = MediaPlayer.create(CameraLauncherActivity.this, R.raw.button);
btnCapture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// line where getting RuntimeException
camera.takePicture(null, null, mPicture);
}
});
日志：
02-12 14:48:41.580: E/AndroidRuntime(6997): FATAL EXCEPTION: main
02-12 14:48:41.580: E/AndroidRuntime(6997): java.lang.RuntimeException: takePicture failed
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.hardware.Camera.native_takePicture(Native Method)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.hardware.Camera.takePicture(Camera.java:1126)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.hardware.Camera.takePicture(Camera.java:1071)
02-12 14:48:41.580: E/AndroidRuntime(6997): at app.cam.shane.CameraLauncherActivity$3.onClick(CameraLauncherActivity.java:116)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.view.View.performClick(View.java:4223)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.view.View$PerformClick.run(View.java:17275)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.os.Handler.handleCallback(Handler.java:615)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.os.Handler.dispatchMessage(Handler.java:92)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.os.Looper.loop(Looper.java:137)
02-12 14:48:41.580: E/AndroidRuntime(6997): at android.app.ActivityThread.main(ActivityThread.java:4921)
02-12 14:48:41.580: E/AndroidRuntime(6997): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 14:48:41.580: E/AndroidRuntime(6997): at java.lang.reflect.Method.invoke(Method.java:511)
02-12 14:48:41.580: E/AndroidRuntime(6997): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036)
02-12 14:48:41.580: E/AndroidRuntime(6997): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
02-12 14:48:41.580: E/AndroidRuntime(6997): at dalvik.system.NativeStart.main(Native Method)
注意：- 就像 Pudding Camera 一样，它们允许用户连续点击 Capture 按钮，但它们永远不会显示异常，如果你点击 50 次它会捕获 10 个或更多图像，每个图像在特定时间后但不显示异常，就像我进入我的代码一样，我该如何处理这个异常？
完整代码：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
preview=(SurfaceView)findViewById(R.id.surface);
previewHolder=preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
btnCapture = (ImageButton) findViewById(R.id.btnCapture);
final MediaPlayer mp = MediaPlayer.create(CameraLauncherActivity.this, R.raw.button);
btnCapture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mp.start();
camera.takePicture(null, null, mPicture);
}
});
@Override
public void onResume() {
super.onResume();
camera=Camera.open();
}
@Override
public void onPause() {
super.onPause();
if (inPreview) {
camera.stopPreview();
}
camera.release();
camera=null;
inPreview=false;
}
private Camera.Size getBestPreviewSize(int width, int height,
Camera.Parameters parameters) {
Camera.Size result=null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if (size.width <= width && size.height <= height) {
if (result == null) {
result=size;
}
else {
int resultArea=result.width * result.height;
int newArea=size.width * size.height;
if (newArea > resultArea) {
result=size;
}
}
}
}
return(result);
}
private Camera.Size getSmallestPictureSize(Camera.Parameters parameters) {
Camera.Size result=null;
for (Camera.Size size : parameters.getSupportedPictureSizes()) {
if (result == null) {
result=size;
}
else {
int resultArea=result.width * result.height;
int newArea=size.width * size.height;
if (newArea < resultArea) {
result=size;
}
}
}
return(result);
}
SurfaceHolder.Callback surfaceCallback=new SurfaceHolder.Callback(){
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
} catch (Throwable t) {
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(CameraLauncherActivity.this, t.getMessage(), Toast.LENGTH_LONG).show();
}
}
public void surfaceChanged(SurfaceHolder holder,int format, int width,int height) {
params = camera.getParameters();
params.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
Camera.Size size = getBestPreviewSize(width, height, params);
Camera.Size pictureSize=getSmallestPictureSize(params);
if (size != null && pictureSize != null) {
params.setPreviewSize(size.width, size.height);
params.setPictureSize(pictureSize.width,
pictureSize.height);
camera.setParameters(params);
camera.startPreview();
inPreview=true;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
}
};
PictureCallback mPicture = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
pictureFile = getOutputMediaFile();
camera.startPreview();
if (pictureFile == null) {
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
}
};
static File getOutputMediaFile() {
/* yyyy-MM-dd'T'HH:mm:ss.SSSZ */
timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
// file name
mediaFile = new File(LoginActivity.mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
}
【问题讨论】：
-
您是否在清单中添加了所需的权限？
-
一切正常，只想控制连续点击并控制异常
-
你必须在
takePicture()之后打电话给startPreview() -
1.请在您的问题中添加 onPictureTaken() 代码。 2. onTouchEvent() 什么时候使用？ 3.你想只按按钮拍照吗？ 4. 按一次按钮会出现RuntimeException吗？
-
@Melquiades 你好兄弟，我发布了完整的代码，请立即检查，多次按下时会出现 RuntimeException 没有任何中断，否则工作正常
标签： java android android-camera runtimeexception