ActivityCollector.java

package?sunny.example.comeonbroadcastreceiverdo;

import?android.app.Activity;
import?java.util.List;
import?java.util.ArrayList;
public?class?ActivityCollector?{

	public?static?ListactivitiesList?=?new?ArrayList();
	
	public?static?void?addAtivity(Activity?activity){
		activitiesList.add(activity);
	}
	public?static?void?removeActivity(Activity?activity){
		activitiesList.remove(activity);
	}
	public?static?void?finishAll(){
		for(Activity?activity:activitiesList){
			if(!activity.isFinishing()){
				activity.finish();
			}
		}
	}
}

BaseActivity.java

package?sunny.example.comeonbroadcastreceiverdo;

import?android.app.Activity;
import?android.os.Bundle;
public?class?BaseActivity?extends?Activity{
	
	@Override
	protected?void?onCreate(Bundle?savedInstanceState){
		super.onCreate(savedInstanceState);
		ActivityCollector.addAtivity(this);
	}
	@Override
	protected?void?onDestroy(){
		super.onDestroy();
		ActivityCollector.removeActivity(this);
	}

}

使用：

public?class?MainActivity?extends?BaseActivity{
protected?void?onCreate(Bundle?savedInstanceState){
//BaseActivity中的onCreate()
super.onCreate(savedInstanceState);
........
?public?void?onClick(View?view){
????????ActivityCollector.finishAll();
}
.....
?}}