我正在使用进度对话框来显示活动的进度。它开始运行，但即使在调用 removeDialog() 后它也不会关闭。这是代码：
public class MainActivity extends Activity {
static final int PROGRESS_DIALOG = 0;
ProgressDialog progressDialog = null;
ProgressBar progressBar;
MagickImage img = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// InputStream stream = getResources().openRawResource(R.raw.app_notes);
try {
img = new MagickImage(new ImageInfo("/mnt/sdcard/image_background.jpg"));
// setContentView(R.layout.main);
Spinner s = (Spinner) findViewById(R.id.spinner);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
ArrayAdapter adapter = ArrayAdapter.createFromResource(MainActivity.this,R.array.effects, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
s.setAdapter(adapter);
s.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
ProgressThread t = new ProgressThread(img, pos);
t.run();
// progressDialog.dismiss();;
}
public void onNothingSelected(AdapterView<?> parent) {
// D o nothing.
}
});
ImageView iv = (ImageView) findViewById(R.id.imageView);
iv.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
iv.setAdjustViewBounds(true);
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize=8; //try to decrease decoded image
options.inPurgeable=true; //if necessary purge pixels into disk
options.inScaled=true; //scale down image to actual device density
iv.setImageBitmap(MagickBitmap.ToBitmap(img));
} catch (MagickApiException e) {
e.printStackTrace();
} catch (MagickException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
/*
* TextView tv = new TextView(this);
* tv.setText(DisplayImageMetaData.displayMagickImage(img));
* setContentView(tv);
*/
}
protected Dialog onCreateDialog(int id, Bundle bundle) {
switch (id) {
case PROGRESS_DIALOG:
/*
* ProgressDialog dialog =
* ProgressDialog.show(AndroidMagickActivity.this, "",
* "Loading. Please wait...", true);
*/
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.setMessage("Loading...");
progressDialog.show(MainActivity.this,"", "Loading... Please Wait", true);
return progressDialog;
// return dialog;
default:
return null;
}
}
/** Nested class that performs progress calculations (counting) */
private class ProgressThread extends Thread {
MagickImage img;
int pos;
ProgressThread(MagickImage image, int pos) {
this.img = image;
this.pos = pos;
}
public void run() {
int effect = 0;
MainActivity.this.showDialog(PROGRESS_DIALOG);
new BackgroundAsyncTask().execute();
switch (pos) {
case 1:
effect = NoiseType.UndefinedNoise;
break;
case 2:
effect = NoiseType.UniformNoise;
break;
case 3:
effect = NoiseType.GaussianNoise;
break;
case 4:
effect = NoiseType.MultiplicativeGaussianNoise;
break;
case 5:
effect = NoiseType.ImpulseNoise;
break;
case 6:
effect = NoiseType.LaplacianNoise;
break;
case 7:
effect = NoiseType.PoissonNoise;
break;
}
Bitmap bitmap = null;
try {
ImageView iv = (ImageView) findViewById(R.id.imageView);
MagickImage image = null;
if (pos < 8)
image = img.addNoiseImage(effect);
else if (pos == 9)
image = img.blurImage(5, 1);
else if (pos == 10)
image = img.charcoalImage(5, 1);
else if (pos == 11)
image = img.edgeImage(0);
if (image != null) {
iv.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
iv.setAdjustViewBounds(true);
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize=8; //try to decrease decoded image
options.inPurgeable=true; //if necessary purge pixels into disk
options.inScaled=true; //scale down image to actual device density
bitmap = MagickBitmap.ToBitmap(image);
iv.setImageBitmap(bitmap);
}
MainActivity.this.removeDialog(PROGRESS_DIALOG);
} catch (MagickException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
MainActivity.this.removeDialog(PROGRESS_DIALOG);
}
}
}
}
我不知道我在犯哪个错误。请帮助我。在此先感谢。