Android 如何恢复活动？

How to resume an activity?

提问by Diablo.Wu

Suppose there are three activity,the display order is a->b->c. Now, I would like to resume the Activity a directly,after Activityc complete some operations. Resume the Activitya by Activityc directly,but create a new instance of Activity a.

假设有3个activity，显示顺序是a->b->c。现在，我想直接恢复Activity a，在Activityc完成一些操作后。直接Activity通过Activityc恢复a ，但是新建一个Activity a的实例。

回答by dylan murphy

as @Matthias said, do you want to resume or restart Activity a? if you want to restart it then you would include FLAG_ACTIVITY_CLEAR_TASKin your intent which does this: "If set in an Intent passed to Context.startActivity(), this flag will cause any existing task that would be associated with the activity to be cleared before the activity is started".

正如@Matthias 所说，您是要恢复还是重新启动 Activity a？如果你想重新启动它，那么你会FLAG_ACTIVITY_CLEAR_TASK在你的意图中包括：“如果在传递给 Context.startActivity() 的意图中设置，这个标志将导致与活动相关联的任何现有任务在活动开始”。

or you could probably just call finish();in Activity a's onPause

或者你可以只调用finish();Activity a'sonPause

if you want to resume it then you just call startActivity(new Intent(Parent.this, ActivityA.class));or whatever your code is

如果你想恢复它，那么你只需调用startActivity(new Intent(Parent.this, ActivityA.class));或任何你的代码

additional information: Activities, Intent, Activity and Task Design

附加信息：活动、意图、活动和任务设计

回答by user1097540

• In b you use BroadcastReceiverin onResume()method with content finish()as:

• 在 b 中，您BroadcastReceiver在onResume()方法中使用内容finish()为：

BroadcastReceiver receiverFinish=null;

@Override

protected void onResume() {

  super.onResume();
  if(receiverFinish!=null){
      unregisterReceiver(receiverFinish);
  }
  receiverFinish=new BroadcastReceiver() {

广播接收器接收器Finish=null;

@Override

protected void onResume() {

  super.onResume();
  if(receiverFinish!=null){
      unregisterReceiver(receiverFinish);
  }
  receiverFinish=new BroadcastReceiver() {

 @Override          
public void onReceive(Context context, Intent intent) {


                if(intent.getAction().equals("finish.activity")){
                        MyActivity.this.finish();
                    }
                                }       };
                registerReceiver(receiverFinish, new IntentFilter("finish.activity"));

    }

• Then in c you call :

• 然后在 c 中调用：

//finish b activity

Intent intent=new Intent("finish.activity"); sendBroadcast(intent);

//finish c activity

finish();

//完成b活动

意图意图=新意图（“完成。活动”）；发送广播（意图）；

//完成c活动

结束（）;

• Hope useful for you! good cluck!
• From Pham Trung Phuong - Vsoft Corp.

• 希望对你有用！好咯咯！
• 从范忠PHUONG - Vsoft公司。