activity启动FLAG之FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET

从字面含义就能看出来，意思是当TASK重置时，该activity会被清除。运行下面小示例就能看出其作用了.

MainActivity：

package com.home;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Button btn = new Button(this);
		btn.setText("跳转");
		setContentView(btn);
		btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				Intent in = new Intent(MainActivity.this, SecondActivity.class);
				// 重置该task时清除该activity
				in.setFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
				startActivity(in);
			}
		});
	}

}

SecondActivity：

package com.home;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class SecondActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		TextView tv = new TextView(this);
		tv.setText("the second activity");
		setContentView(tv);
	}
}

activity启动FLAG之FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET,布布扣,bubuko.com

activity启动FLAG之FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET

原文：http://blog.csdn.net/u010142437/article/details/22388559