问题定义：这里我尝试开发一个应用程序，它是从库中选择图像，而用户必须单击按钮并打开选项菜单，如“捕获图像”和“从库中选择”，并从任一库中选择图像或通过相机捕捉。我尝试以编程方式显示所选图像集按钮左侧（按钮左侧可绘制属性）。虽然我试图从前置摄像头捕获图像，然后它的工作正常。但是当我尝试使用后置（后置）相机的时候我的应用程序会崩溃.. 我该怎么做才能使用两个相机（前+后）？
What i needed in output from back camera on button click open opt menu
private static final int CAMERA_REQUEST_CLOSEUP_SMILE = 1;
private static final int PICK_FROM_GALLERY_CLOSEUP_SMILE = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_registration);
final String[] option = new String[] { "Take from Camera","Select from Gallery" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.select_dialog_item, option);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select Option");
builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Log.e("Selected Item", String.valueOf(which));
if (which == 0) {
callCamera();
}
if (which == 1) {
callGallery();
}
}
});
final AlertDialog dialog = builder.create();
btnCloseUpSmile.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
dialog.show();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != RESULT_OK)
return;
switch (requestCode) {
case CAMERA_REQUEST_CLOSEUP_SMILE:
case PICK_FROM_GALLERY_CLOSEUP_SMILE:
Bundle extras2 = data.getExtras();
Uri filePath = data.getData();
Bitmap bCloseUpSmile=getPath(data.getData());
int widthCloseUp = bCloseUpSmile.getWidth();
int heightCloseUp = bCloseUpSmile.getHeight();
int newWidth = (btnCloseUpSmile.getHeight()/2);
int newHeight = (btnCloseUpSmile.getHeight()/2);
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / widthCloseUp;
float scaleHeight = ((float) newHeight) / heightCloseUp;
Matrix matrixCloseUp = new Matrix();
matrixCloseUp.postScale(scaleWidth, scaleHeight);
Bitmap resizedBitmapCloseUp = Bitmap.createScaledBitmap(bCloseUpSmile, 36, 36, true);
Drawable d=(new BitmapDrawable(getResources(), resizedBitmapCloseUp));
bitmapForCloseUpSmile = resizedBitmapCloseUp;
boolCloseUpSmile=true;
btnCloseUpSmile.setCompoundDrawablesWithIntrinsicBounds(d, null, null, null);
selectedImageCloseUpSmile=getStringPathImage(data.getData());
System.out.println("File Path = "+selectedImageCloseUpSmile);
break;
}
private Bitmap getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String filePath = cursor.getString(column_index);
// Convert file path into bitmap image using below line.
Bitmap bitmap = BitmapFactory.decodeFile(filePath);
return bitmap;
}
/**
* open camera method
*/
// ------------------------------ With Smile Reuest------------------------------------------------------------------
public void callCamera() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST_CLOSEUP_SMILE);
}
/**
* open gallery method
*/
public void callGallery() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"),PICK_FROM_GALLERY_CLOSEUP_SMILE);
}
//----------------------------------------------------------------------------------------------------------------------
崩溃日志（错误）：
06-17 18:27:27.051: E/AndroidRuntime(23500): FATAL EXCEPTION: main
06-17 18:27:27.051: E/AndroidRuntime(23500): Process: com.mayur.demo, PID: 23500
06-17 18:27:27.051: E/AndroidRuntime(23500): java.lang.RuntimeException: Unable to resume activity {com.mayur.demo/com.mayur.demo.ActivityRegistration}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=3, result=-1, data=Intent { act=inline-data dat=content://media/external/images/media/286844 (has extras) }} to activity {com.mayur.demo/com.mayur.demo.ActivityRegistration}: java.lang.IllegalArgumentException: width and height must be > 0
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2996)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3025)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2396)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3974)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.access$1000(ActivityThread.java:166)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1287)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.os.Handler.dispatchMessage(Handler.java:102)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.os.Looper.loop(Looper.java:146)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.main(ActivityThread.java:5511)
06-17 18:27:27.051: E/AndroidRuntime(23500): at java.lang.reflect.Method.invokeNative(Native Method)
06-17 18:27:27.051: E/AndroidRuntime(23500): at java.lang.reflect.Method.invoke(Method.java:515)
06-17 18:27:27.051: E/AndroidRuntime(23500): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
06-17 18:27:27.051: E/AndroidRuntime(23500): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
06-17 18:27:27.051: E/AndroidRuntime(23500): at dalvik.system.NativeStart.main(Native Method)
06-17 18:27:27.051: E/AndroidRuntime(23500): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=3, result=-1, data=Intent { act=inline-data dat=content://media/external/images/media/286844 (has extras) }} to activity {com.mayur.demo/com.mayur.demo.ActivityRegistration}: java.lang.IllegalArgumentException: width and height must be > 0
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.deliverResults(ActivityThread.java:3601)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2983)
06-17 18:27:27.051: E/AndroidRuntime(23500): ... 13 more
06-17 18:27:27.051: E/AndroidRuntime(23500): Caused by: java.lang.IllegalArgumentException: width and height must be > 0
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.graphics.Bitmap.createBitmap(Bitmap.java:922)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.graphics.Bitmap.createBitmap(Bitmap.java:901)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.graphics.Bitmap.createBitmap(Bitmap.java:833)
06-17 18:27:27.051: E/AndroidRuntime(23500): at com.mayur.demo.ActivityRegistration.onActivityResult(ActivityRegistration.java:515)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.Activity.dispatchActivityResult(Activity.java:5514)
06-17 18:27:27.051: E/AndroidRuntime(23500): at android.app.ActivityThread.deliverResults(ActivityThread.java:3597)
06-17 18:27:27.051: E/AndroidRuntime(23500): ... 14 more