由网友(我的柔情,誰會懂得體會/)分享简介：我使用的是按钮，然后我启动统一活动主要活动，但我需要完成它，并返回到previous活动，而是整个应用程序被关闭。I have a main activity using a button then i launch the unity activity, but i need to finish it and go...

我使用的是按钮，然后我启动统一活动主要活动，但我需要完成它，并返回到previous活动，而是整个应用程序被关闭。

I have a main activity using a button then i launch the unity activity, but i need to finish it and go back to the previous activity, but instead the whole app is closed.

我能做些什么？ 谢谢！

What can I do? Thank you!

编辑：

我用的是AR玩家从高通公司扩增实境（统一扩展） 我只有一个，我开始从高通公司扩增实境的AR玩家主要活动。

I use the AR player from Qualcomm Augmented Reality (Unity Extension) I have only one main activity which I start the AR player from Qualcomm Augmented Reality.

主要活动的

public class Main extends Activity{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

public void onBtnStartClick(final View v) {
    Intent i= new Intent(this,ArPart.class);
    startActivity(i);
}

}

AR玩家活动的

public class ArPart extends QCARPlayerActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) {
         finish();
    }
    return super.onKeyDown(keyCode, event);
}

}

推荐答案

我发现它最容易使用的覆盖 onBack pressed（），但要做到这一点，你还必须做出改变在统一的项目：

I found it easiest to use the overridden onBackPressed() but to do that you also have to make a change in your Unity project:

void Update ()
{
    if (Input.GetKeyUp (KeyCode.Escape)) {

        AndroidJavaClass jc = new AndroidJavaClass ("com.unity3d.player.UnityPlayer"); 
        AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject> ("currentActivity"); 
        jo.Call ("onBackPressed");
    }
}

然后，在你的活动类：

Then, in your activity class:

@Override
public void onBackPressed() {

    // Handle the activity however you want,
    // what you do here will be executed when the back button is pressed
}

此外，请记住这个工作不出所料，UnityPlayer对象的不能暂停 - 你应该暂停它，你已经处理后退按钮preSS事件之后

Also, remember that for this to work as expected, the UnityPlayer object cannot be paused - you should pause it after you've handled the back button press event.

幸得@Frank阮从这个主题：Can't回传事件从统一到Android库JAR 。

Credit goes to @Frank Nguyen from this thread: Can't pass back event from Unity to android library jar.