Special android usage 1

1. Make an image transparent:

1. Bitmap buffer = Bitmap. createBitmap (width, height, Bitmap. Config. ARGB_4444); buffer. eraseColor (Color. TRANSPARENT );

2. send an email directly:

1. Intent intent = new Intent (Intent. ACTION_SENDTO, Uri. fromParts ("mailto", "test@test.com", null ));

2. intent. setFlags (Intent. FLAG_ACTIVITY_NEW_TASK );

3. context. startActivity (intent );

3. program control screen highlighted:

1. WindowManager. LayoutParams lp = getWindow (). getAttributes ();

2. lp. screenBrightness = 100/100 running F;

3. getWindow (). setAttributes (lp );

4. Filter specific text

1. Filter filter = myAdapter. getFilter ();

2. filter. filter (mySearchText );

5. scrollView scroll stop event

1. setOnScrollListener (new OnScrollListener (){

2. public void onScroll (AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount ){

3. // TODO Auto-generated method stub}

4. public void onScrollStateChanged (AbsListView view, int scrollState ){

5. // TODO Auto-generated method stub

6. if (scrollState = 0) Log. I ("a", "scrolling stopped ...");}});}

6. Initiate an association for a specific program to open

1. Bitmap bmp = getImageBitmap (jpg );

2. String path = getFilesDir (). getAbsolutePath () + "/test.png ";

3. File file = new File (path );

4. FileOutputStream fos = new FileOutputStream (file );

5. bmp. compress (CompressFormat. PNG, 100, fos );

6. fos. close ();

7.

8. Intent intent = new Intent ();

9. intent. setAction (android. content. Intent. ACTION_VIEW );

10. intent. setDataAndType (Uri. fromFile (new File (path), "image/png ");

11. startActivity (intent );

12. An error occurs when the index format is not applicable to the image.

13. Intent intent = new Intent ();

14. intent. setAction (android. content. Intent. ACTION_VIEW );

15. File file = new File ("/sdcard/test.mp4 ");

16. intent. setDataAndType (Uri. fromFile (file), "video /*");

17. startActivity (intent );

18.

19. Intent intent = new Intent ();

20. intent. setAction (android. content. Intent. ACTION_VIEW );

21. File file = new File ("/sdcard/test.pdf ");

22. intent. setDataAndType (Uri. fromFile (file), "audio /*");

23. startActivity (intent );

7. Set the text appearance

1. setTextAppearance (context, android. R. style. TextAppearance_Medium );

2. android: textAppearance = "? Android: attr/textAppearanceMedium"

8. Set an independent launch mode:

1. <activity

2. android: name = ". ArtistActivity"

3. android: label = "Artist"

4. android: launchMode = "singleTop">

5. </activity>

6. www.2cto.com

7. Intent I = new Intent ();

8. I. putExtra (EXTRA_KEY_ARTIST, id );

9. I. setClass (this, ArtistActivity. class );

10. I. addFlags (Intent. FLAG_ACTIVITY_SINGLE_TOP );

11. startActivity (I );

 

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