当我从图库中获取图像时，我正在创建一个相框应用程序，但工作正常，但是当我尝试从相机中获取图像时，我的framelayout.getwidth（）和framelayout.getHeight（）方法返回0。
我的代码如下：
btnGetImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imagePickerDialog();
}
});
public void imagePickerDialog() {
AlertDialog.Builder myAlertDialog = new AlertDialog.Builder(this);
myAlertDialog.setTitle("Pictures Option");
myAlertDialog.setIcon(R.drawable.getimage_icon);
myAlertDialog.setMessage("Select Picture From...");
myAlertDialog.setPositiveButton("Gallery",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
Intent fileIntent = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(fileIntent,
Constant.FILE_REQUEST);
}
});
myAlertDialog.setNegativeButton("Camera",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
Intent cameraIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent,
Constant.CAMERA_REQUEST);
}
});
myAlertDialog.show();
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == Constant.CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap camera_image = (Bitmap) data.getExtras().get("data");
addViewInFrame(camera_image);
} else if (requestCode == Constant.FILE_REQUEST
&& resultCode == RESULT_OK) {
Uri selectedImage = data.getData();
String[] filePath = { MediaStore.Images.Media.DATA };
Cursor c = getContentResolver().query(selectedImage, filePath,
null, null, null);
c.moveToFirst();
int columnIndex = c.getColumnIndex(filePath[0]);
String picturePath = c.getString(columnIndex);
c.close();
addViewInFrame(getScaledBitmap(picturePath, 300, 300));
}
}
public void addViewInFrame(Bitmap viewBit) {
if (android.os.Build.VERSION.SDK_INT <= 10) {
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int screenWidth = metrics.widthPixels;
int screenHeight = metrics.heightPixels;
imageBitmap = Bitmap.createScaledBitmap(viewBit, screenWidth,
screenHeight / 2, true);
image1 = new TouchImageView(getApplicationContext());
image1.setScaleType(ScaleType.MATRIX);
image1.setImageBitmap(imageBitmap);
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
screenWidth, screenHeight / 2);
params.leftMargin = 0;
params.topMargin = 0;
frame.addView(image1, params);
else {
imageBitmap = Bitmap.createScaledBitmap(viewBit,
frame.getWidth(), frame.getHeight() / 2, true);
image1 = new TouchImageView(getApplicationContext());
image1.setScaleType(ScaleType.MATRIX);
image1.setImageBitmap(imageBitmap);
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(
frame.getWidth(), frame.getHeight() / 2);
params.leftMargin = 0;
params.topMargin = 0;
frame.addView(image1, params);
}
这是我的框架布局。
错误日志为：
Process: com.example.imageoverotherimage, PID: 3065
java.lang.RuntimeException: Unable to resume activity
{com.example.imageoverotherimage/com.example.imageoverotherimage.MainActivity}:
java.lang.RuntimeException: Failure delivering result
ResultInfo{who=null, request=1888, result=-1, data=Intent {
act=inline-data dat=content://media/external/images/media/6658 (has extras) }}
to activity {com.example.imageoverotherimage/com.example.imageoverotherimage.MainActivity}:
java.lang.IllegalArgumentException: width and height must be > 0
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2996)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3025)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2396)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3974)
at android.app.ActivityThread.access$1000(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1287)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Failure delivering result
ResultInfo{who=null, request=1888, result=-1, data=Intent {
act=inline-data dat=content://media/external/images/media/6658 (has extras) }}
to activity {com.example.imageoverotherimage/com.example.imageoverotherimage.MainActivity}:
java.lang.IllegalArgumentException: width and height must be > 0
at android.app.ActivityThread.deliverResults(ActivityThread.java:3601)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2983)
... 13 more
Caused by: java.lang.IllegalArgumentException: width and height must be > 0
at android.graphics.Bitmap.createBitmap(Bitmap.java:922)
at android.graphics.Bitmap.createBitmap(Bitmap.java:901)
at android.graphics.Bitmap.createBitmap(Bitmap.java:833)
at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:709)
at com.example.imageoverotherimage.MainActivity.addViewInFrame(MainActivity.java:232)
at com.example.imageoverotherimage.MainActivity.onActivityResult(MainActivity.java:187)
at android.app.Activity.dispatchActivityResult(Activity.java:5514)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3597)
... 14 more
谢谢。
最佳答案
您应该在getWidth()事件之后或之内调用getHeight()和onLayout()方法。这是该过程的更详细描述
How Android Draws Views。
尝试在此方法中调用frame.getWidth()，您会发现它的结果与0不同。
frame.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top,
int right, int bottom,
int oldLeft, int oldTop,
int oldRight, int oldBottom) {
int w = frame.getWidth();
}
});