Question

怎么销毁指定的Activity

Answer 1

步骤如下：
（1）创建一个ActivityCollector.java，此类用作收集和销毁activity的公共类.
public class ActivityCollector {

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();
}
}
}

}
(2).创建一个BaseActivity.java基类,项目中的所有activity都继承此类.
public class BaseActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ActivityCollector.addActivity(this);
}

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
ActivityCollector.removeActivity(this);
}
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(3)
让A, B,
C这三个activity分别去继承BaseActivity.java.这样只要activity一起动,或者子activity中重写了
onDestroy()方法,子activity就会自动的去收集activity,去销毁某个Activity.
(4).如何在某个地方需要一次销毁所有的activity,只需要调用ActivityCollector.java中的finishAll()方法.
比如在app中的任何一个界面调用loginout方法,就需要用到一次kill多个activity:
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public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case ConstantUtil.LOGINOUT:
ActivityCollector.finishAll();
break;
}
}