用BroadCast来退出应用

广播的优势，可以跨栈操作，当app内不止一个栈的时候，比较方便。

1.广播接收器和响应操作

public class FinishBroadCastReceiver extends BroadcastReceiver {

	@Override
	public void onReceive(Context context, Intent intent) {
		if("com.example.finish".equals(intent.getAction())){
			Activity activty = (Activity) context;
			activty.finish();
		}
	}

}

1注册广播接收器

public class MainActivity extends Activity {

	private FinishBroadCastReceiver receiver;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		TextView mTv = (TextView) findViewById(R.id.tv);
		mTv.setText("MainActivity");
		mTv.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				startActivity(new Intent(MainActivity.this, SecondActivity.class));
			}
		});
		rigisterReceiver();
	}
	
	pr
	

2.发送广播

<pre name="code" class="java">public class ThirdActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		TextView mTv = (TextView) findViewById(R.id.tv);
		mTv.setText("ThirdActivity");
		mTv.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				sendFinishBroadCast();
				Toast.makeText(ThirdActivity.this, "前面的哥们你们先撤吧", 0).show();
			}
		});
	}
	
	private void sendFinishBroadCast() {
		Intent intent = new Intent();
		intent.setAction("com.example.finish");
		sendBroadcast(intent);
	}

	

}