如何返回到起始活性 [英] How to return to the starting activity

问题描述

我编程一个简单的游戏，玩后，玩家看到一个得分屏幕，在其中点被写入。现在，我希望玩家有一个返回到主屏幕按钮，带来了他的主要活动，这是 StartActivity 。

我尝试以下code（见下文），但它不工作。我究竟做错了什么？

 公共类ScoreActivity扩展活动实现OnClickListener {

    @覆盖
    保护无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_score）;
        Button按钮=（按钮）findViewById（R.id.startbutton）;
        button.setOnClickListener（本）;
    }

    @覆盖
    公共无效的onClick（视图v）{
        意向意图=新的意图（ScoreActivity.this，StartActivity.class）;
        组件名CN = intent.getComponent（）;
        意图mainIntent = IntentCompat.makeRestartActivityTask（CN）;
        startActivity（mainIntent）;
    }

}
 

解决方案

添加以下标志打电话时意图

  intent.addFlags（Intent.FLAG_ACTIVITY_NEW_TASK）;
intent.addFlags（Intent.FLAG_ACTIVITY_SINGLE_TOP）;
 

所以这将删除previous回栈即现在你用这个。

  @覆盖
    公共无效的onClick（视图v）{
        意图mIntent =新的意图（ScoreActivity.this，StartActivity.class）
        .addFlags（Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP）;
        startActivity（mIntent）;
    }
 

现在你是在活动开始时preSS当年的应用程序退出

I'm programming a simple game, and after playing, the player sees a score-screen, in which the points are written. Now, I want the player to have a "Return to main screen" button that brings him to the main activity, which is StartActivity.

I tried the following code (see below), but it doesn't work. What am I doing wrong?

public class ScoreActivity extends Activity implements OnClickListener{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_score);
        Button button = (Button)findViewById (R.id.startbutton);
        button.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        Intent intent = new Intent(ScoreActivity.this, StartActivity.class);
        ComponentName cn = intent.getComponent();
        Intent mainIntent = IntentCompat.makeRestartActivityTask(cn);
        startActivity(mainIntent);
    }

}

解决方案

Add following flags when calling intent

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

so this will remove previous back stack i e now you use this .

@Override
    public void onClick(View v) {
        Intent mIntent = new Intent(ScoreActivity.this, StartActivity.class)
        .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        startActivity(mIntent);
    }

Now you are at starting activity and when press back then app exits

这篇关于如何返回到起始活性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！