android-管理activity，随时随地退出Activity

ActivityController.java

package com.wang.startmethod;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;

public class ActivityController {
public static List<Activity> activities = new ArrayList<Activity>();

public static void addActivity(Activity activity){
activities.add(activity);
}

public static void removeActivity(Activity activity){
activities.remove(activity);

}

public static void finishAll(){
for(Activity activity:activities){
if(!activity.isFinishing()){
activity.finish();
}
}
}

}

BaseActivity.java管理Activity

package com.wang.startmethod;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
//知晓当前是哪一个活动
public class BaseActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("BaseActivity===", getClass().getSimpleName());
ActivityController.addActivity(this);
}

@Override
protected void onDestroy() {
super.onDestroy();
ActivityController.removeActivity(this);
}

}

ThirdActivity.java测试关闭所有activity

package com.wang.startmethod;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;

public class ThirdActivity extends BaseActivity{

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("ThirdActivity===", this.toString());
Log.d("ThirdActivity===", "Task id is "+getTaskId());
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.third_layout);
Button button = (Button) findViewById(R.id.button3);
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
ActivityController.finishAll();

}
});

}

}

third_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<Button
android:id="@+id/button3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Back"
/>

</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wang.startmethod"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.wang.startmethod.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<activity
android:name="com.wang.startmethod.ThirdActivity"
android:label="@string/app_name" >
</activity>
<activity
android:name="com.wang.startmethod.BaseActivity"
android:label="@string/app_name" >
</activity>
</application>

</manifest>