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

Intent intent = new Intent(Intent.ACTION_SENDTO, Uri .fromParts("mailto", "test@test.com", null));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);

WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 100 / 100.0f;
getWindow().setAttributes(lp);

Filter filter = myAdapter.getFilter();
filter.filter(mySearchText);

setOnScrollListener(new OnScrollListener(){
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub  }
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
if(scrollState == 0) Log.i("a", "scrolling stopped...");  } });}

Bitmap bmp = getImageBitmap(jpg);
String path = getFilesDir().getAbsolutePath() + "/test.png";
File file = new File(path);
FileOutputStream fos = new FileOutputStream(file);
bmp.compress( CompressFormat.PNG, 100, fos );
 fos.close();
  Intent intent = new Intent();
  intent.setAction(android .content.Intent.ACTION_VIEW);
  intent.setDataAndType(Uri .fromFile(new File(path)), "image/png");
  startActivity(intent);

Intent intent = new Intent();
intent.setAction(android .content.Intent.ACTION_VIEW);
File file = new File("/sdcard/test.mp4");
intent.setDataAndType(Uri .fromFile(file), "video/*");
startActivity(intent);
Intent intent = new Intent();
intent.setAction(android .content.Intent.ACTION_VIEW);
File file = new File("/sdcard/test.mp3");
intent.setDataAndType(Uri .fromFile(file), "audio/*");
startActivity(intent);

setTextAppearance(context, android .R.style.TextAppearance_Medium);
android :textAppearance="?android :attr/textAppearanceMedium"

<activity
 android :name=".ArtistActivity"
 android :label="Artist"
 android :launchMode="singleTop">
</activity>

Intent i = new Intent();
i.putExtra(EXTRA_KEY_ARTIST, id);
i.setClass(this, ArtistActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(i);

Bitmap myCoolBitmap = ... ;
   int w = myCoolBitmap.getWidth(), h = myCoolBitmap.getHeight();
   Bitmap rounder = Bitmap.createBitmap(w,h,Bitmap.Config.ARGB_8888);
   Canvas canvas = new Canvas(rounder);
   Paint xferPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
   xferPaint.setColor(Color.RED);
   canvas.drawRoundRect(new RectF(0,0,w,h), 20.0f, 20.0f, xferPaint);
   xferPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
//然后呢实现
canvas.drawBitmap(myCoolBitmap, 0,0, null);
canvas.drawBitmap(rounder, 0, 0, xferPaint);

Notification notification = new Notification (icon, tickerText, when);
notification .number = 4;

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android ="http://schemas.android .com/apk/res/android " android :shape="rectangle">
  <gradient android :startColor="#FFFFFFFF" android :endColor="#FFFF0000"
      android :angle="270"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="NewTheme" parent="android :Theme">
<item name="android :background">@drawable/shape</item>
</style>
</resources>

<activity android :name=".ShapeDemo" android :theme="@style/NewTheme">

<?php xml version="1.0" ?>
?
<response>
<error>1</error>
<message>Invalid URL.</message>
</response>

public class MyApplication extends Application{
  private String thing = null;
  public String getThing(){
   return thing;
  }
  public void setThing( String thing ){
   this.thing = thing;
  }
}
public class MyActivity extends Activity {
   private MyApplication app;
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     app = ((MyApplication)getApplication());
     String thing = app.getThing();
   }
}