我的应用程序在没有SD卡的设备上崩溃了，但是对于装有SD卡的设备工作正常。当我调试它时，我发现它在
mCamera.takePicture(null, null, jpegCallBack);
方法应用程序正在崩溃以上错误。我很多但是没有找到任何解决方案，我看到了这个链接： -
因此可以在没有SD卡的设备中捕获后台服务中的图像。
请提供一些线索 以下是我的hiddenCamera类的一些方法
@SuppressWarnings("deprecation")
private void startCapturingCall() {
final Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
if (mCamera != null) {
parameters = mCamera.getParameters();
if (FLASH_MODE == null || FLASH_MODE.isEmpty()) {
FLASH_MODE = "auto";
}
parameters.setFlashMode(FLASH_MODE);
pictureSize = getBiggesttPictureSize(parameters);
if (pictureSize != null)
parameters
.setPictureSize(pictureSize.width, pictureSize.height);
// set camera parameters
mCamera.setParameters(parameters);
mCamera.startPreview();
new Handler().postDelayed(new Runnable() {
@SuppressWarnings("deprecation")
@Override
public void run() {
if (isSDPresent) {
mCamera.takePicture(null, null, jpegCallBack);
} else {
Toast.makeText(getApplicationContext(),
"Please Insert SD card", 1000).show();
}
}
}, 2000);
}
}
@SuppressWarnings("deprecation")
Camera.PictureCallback jpegCallBack = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
// checking for SD card
if (isSDPresent) {
mediaStorageDir = new File(Environment
.getExternalStorageDirectory().getAbsolutePath(),
IMAGE_DIRECTORY_NAME);
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
// Create the storage directory if it does not exist
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
}
}
try {
Bitmap userImage = BitmapFactory.decodeByteArray(data, 0,
data.length);
// set file out stream
FileOutputStream out = new FileOutputStream(mediaFile);
// set compress format quality and stream
userImage.compress(Bitmap.CompressFormat.JPEG, 50, out);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
userImage.compress(Bitmap.CompressFormat.JPEG, 50, baos);
mByteArray = baos.toByteArray();
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(),
"Please insert SD card !", Toast.LENGTH_LONG).show();
}
if (mediaStorageDir.exists()) {
getPathOfCapturedImage();
}
HiddenCamera.this.finish();
CameraService.IS_ACTIVITY_FINISHED = true;
}
};
而且，SDDresent总是会给我带来真正的价值。
请就此向我提出建议。在过去的2-3天里，我真的陷入了困境。
这也是三星Grand的设备问题，我的代码工作正常，即使它没有SD卡。但在Moto E中我的应用程序崩溃。相机设置在其中起着重要作用。
由于
答案 0 :(得分：0)
最后我完成了这个，虽然我忙于其他任务，但今天我有时间在这个主题上发表我的答案，因为这个topis很一般，所以我发布这个答案，以帮助其他人我已经想到了这个功能，所以我通过使用 SurfaceTexture 来完成这个任务，但它只适用于版本大于4的版本，而对于小于4的版本，你需要使用surfaceView。
所以这是我的代码： -
public class SurfaceTextureActivity extends Activity implements
SurfaceTextureListener {
private Parameters mParameters;
private Camera.Size mPictureSize;
private static final String sIMAGE_DIRECTORY_NAME = "HiddenCapturedPics";
private byte[] mByteArray;
private Camera mCamera;
private TextureView mTextureView;
private File mMediaFile, mMediaStorageDir = null;
private String mEncodedImage, mImageName, mFinalResponse,
mFlashMode;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTextureView = new TextureView(this);
setContentView(mTextureView);
if (checkCameraHardware(getApplicationContext())) {
mTextureView.setSurfaceTextureListener(this);
Bundle extras = getIntent().getExtras();
mFlashMode = extras.getString("FLASH");
} else {
Toast.makeText(getApplicationContext(),
"Your Device dosen't have a Camera !", Toast.LENGTH_LONG)
.show();
}
}
/** Check if this device has a camera */
private boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
return true;
} else {
return false;
}
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width,
int height) {
mCamera = Camera.open();
mTextureView.setLayoutParams(new FrameLayout.LayoutParams(0, 0,
Gravity.CENTER));
try {
mCamera.setPreviewTexture(surface);
} catch (IOException t) {
}
mCamera.startPreview();
startCapturingCall();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width,
int height) {
// Ignored, the Camera does all the work for us
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
mCamera.stopPreview();
mCamera.release();
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
Toast.makeText(getApplicationContext(), "Dfg", Toast.LENGTH_SHORT)
.show();
// Update your view here!
}
Camera.PictureCallback jpegCallBack = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
// checking for SD card
if (isSDPresent) {
mMediaStorageDir = new File(Environment
.getExternalStorageDirectory().getAbsolutePath(),
sIMAGE_DIRECTORY_NAME);
mMediaFile = new File(mMediaStorageDir.getPath()
+ File.separator + "IMG_" + timeStamp + ".jpg");
if (!mMediaStorageDir.exists()) {
if (!mMediaStorageDir.mkdirs()) {
}
}
try {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
Bitmap userImage = BitmapFactory.decodeByteArray(data, 0,
data.length, options);
FileOutputStream out = new FileOutputStream(mMediaFile);
userImage.compress(Bitmap.CompressFormat.JPEG, 50, out);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
userImage.compress(Bitmap.CompressFormat.JPEG, 50, baos);
mByteArray = baos.toByteArray();
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(),
"Please insert SD card !", Toast.LENGTH_LONG).show();
}
if (mMediaStorageDir.exists()) {
getPathOfCapturedImage();
}
SurfaceTextureActivity.this.finish();
CameraService.IS_ACTIVITY_FINISHED = true;
}
};
private void startCapturingCall() {
if (mCamera != null) {
mParameters = mCamera.getParameters();
if (mFlashMode == null || mFlashMode.isEmpty()) {
mFlashMode = "auto";
}
mParameters.setFlashMode(mFlashMode);
mPictureSize = getBiggesttPictureSize(mParameters);
if (mPictureSize != null)
mParameters.setPictureSize(mPictureSize.width,
mPictureSize.height);
mCamera.setParameters(mParameters);
mCamera.startPreview();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
if (mCamera != null) {
mCamera.startPreview();
mCamera.takePicture(null, null, jpegCallBack);
} else {
mCamera = getCameraInstance();
mCamera.startPreview();
mCamera.takePicture(null, null, jpegCallBack);
}
}
}, 2000);
}
}
private Camera.Size getBiggesttPictureSize(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);
}
public static Camera getCameraInstance() {
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
} catch (Exception e) {
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
}
希望这会有助于其他人.......
以下是供参考的链接： -
Example of Camera preview using SurfaceTexture in Android
Camera.takePicture throws RunTimeException
干杯!!!!!