第一种方法
Java代码
- Intent intent = new Intent(Intent.ACTION_MAIN);
- intent.addCategory(Intent.CATEGORY_HOME);
- intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
- startActivity(intent);
第二种方法
此方法其实不是主要是屏蔽Keycode_Back，让它不结束（finish()）Activity，直接显示HOME界面。
Java代码
- PackageManager pm = getPackageManager();
- ResolveInfo homeInfo = pm.resolveActivity( new Intent(Intent.ACTION_MAIN)
- .addCategory(Intent.CATEGORY_HOME), 0 );
Java代码
- public boolean onKeyDown( int keyCode, KeyEvent event) {
- if (keyCode == KeyEvent.KEYCODE_BACK) {
- ActivityInfo ai = homeInfo.activityInfo;
- Intent startIntent = new Intent(Intent.ACTION_MAIN);
- startIntent.addCategory(Intent.CATEGORY_LAUNCHER);
- startIntent.setComponent( new ComponentName(ai.packageName,
- ai.name));
- startActivitySafely(startIntent);
- return true ;
- } else
- return super .onKeyDown(keyCode, event);
- }
Java代码
- void startActivitySafely(Intent intent) {
- intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
- try {
- startActivity(intent);
- } catch (ActivityNotFoundException e) {
- Toast.makeText( this , R.string.unabletoopensoftware,
- Toast.LENGTH_SHORT).show();
- } catch (SecurityException e) {
- Toast.makeText( this , R.string.unabletoopensoftware,
- Toast.LENGTH_SHORT).show();
- Log
- .e(
- TAG,
- "Launcher does not have the permission to launch "
- + intent
- + ". Make sure to create a MAIN intent-filter for the corresponding activity "
- + "or use the exported attribute for this activity." ,
- e);
- }
- }
