Android 屏蔽和捕获Home键的示例代码

package com.lingdududu.test;  import android.app.Activity; import android.os.Bundle; import android.view.KeyEvent; import android.view.WindowManager; import android.widget.Toast;  public class MainActivity extends Activity {  /** Called when the activity is first created. */  private boolean catchHomeKey = false;  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);  }    @Override  public void onAttachedToWindow() {   // TODO Auto-generated method stub   if (!catchHomeKey) {    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);   }   super.onAttachedToWindow();  }   @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   // TODO Auto-generated method stub   if (keyCode == KeyEvent.KEYCODE_HOME) {    Toast.makeText(MainActivity.this, "你点击了HOME键", Toast.LENGTH_LONG).show();   }   return super.onKeyDown(keyCode, event);  } }