android - 如何在单击按钮时关闭活动？

android - How to close an activity on button click?

提问by Arjun Krishnan

I want a button click to close an Activity. I am new to intents and and a little confused. This is ActivityOnewhich keeps a track of life cycle.
On a button press, it opens ActivityTwoand puts ActivityOnein background.
This works fine when I used this intent in my onClickListener:

我想要一个按钮点击关闭一个活动。我对意图很陌生，而且有点困惑。这是ActivityOne它跟踪生命周期。
按下按钮后，它会打开ActivityTwo并置于ActivityOne后台。
当我在我的中使用这个意图时，这很好用onClickListener：

Intent myIntent = new Intent(ActivityOne.this, ActivityTwo.class);
ActivityOne.this.startActivity(myIntent);

In ActivityTwoI need to use intents and finish()method to close the activity. I tried to Google it and I thought this might work:

在ActivityTwo我需要使用意图和finish()方法来关闭活动。我尝试谷歌它，我认为这可能有效：

Intent myIntent2 = new Intent(getApplicationContext(), ActivityTwo.class);
ActivityTwo.this.finish(myIntent2);

---

---

It didn't work the full code is below:

它没有工作完整的代码如下：

public class ActivityOne extends Activity {

    // ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_one);

        // ...

        Button launchActivityTwoButton = (Button) findViewById(R.id.bLaunchActivityTwo); 
        launchActivityTwoButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO:
                // Launch Activity Two
                // Hint: use Context's startActivity() method

                // Create an intent stating which Activity you would like to start
                Intent myIntent = new Intent(ActivityOne.this, ActivityTwo.class);

                // Launch the Activity using the intent
                ActivityOne.this.startActivity(myIntent);               
            }
        });

        // ...
    }
}

---

---

Activity 2:

活动二：

public class ActivityTwo extends Activity {    

    // ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);

        // ...

        Button closeButton = (Button) findViewById(R.id.bClose); 
        closeButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                // TODO:
                // This function closes Activity Two
                // Hint: use Context's finish() method
                Intent myIntent2 = new Intent(getApplicationContext(), ActivityTwo.class);
                ActivityTwo.this.finish(myIntent2);
            }
        });
        // ...
    }
}

回答by Michael Yaworski

You want to close ActivityTwowhen a button is clicked? Just use finish();

您想在ActivityTwo单击按钮时关闭吗？只需使用finish();

Full code for the button listener in ActivityTwowould be:

按钮侦听器的完整代码ActivityTwo是：

Button closeButton = (Button) findViewById(R.id.bClose); 
closeButton.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {

        // TODO:
        // This function closes Activity Two
        // Hint: use Context's finish() method
        finish();
    }
});

回答by Namrata

@Arjun Krishnan you want to kill activityTwo?

@Arjun Krishnan 你想杀死activityTwo吗？

try this

尝试这个

 ActivityTwo.this.finish();

It would help you

它会帮助你

回答by SMR

Alright the best way to finish the current Activityis by using finish()method. So inside the onClick()of your button in the ActivityTwoyou can do this.

好吧，完成当前 Activity的最佳方法是使用finish()方法。所以在onClick()你的按钮里面ActivityTwo你可以做到这一点。

closeButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            finish();
            //closes ActivityTwo
        }
});

no need to make new intents for finishing current Activity. Also note that pressing backwill also finish your Activity.

无需为完成当前 Activity 制定新的意图。另请注意，按回也将完成您的活动。

回答by Waqas

Replace these two lines

替换这两行

Intent myIntent2=new Intent(getApplicationContext(),ActivityTwo.class); ActivityTwo.this.finish(myIntent2);

Intent myIntent2=new Intent(getApplicationContext(),ActivityTwo.class); ActivityTwo.this.finish(myIntent2);

with this ActivityTwo.this.finish();

有了这个 ActivityTwo.this.finish();

回答by Pacific P. Regmi

Button exit= (Button) findViewById(R.id.yes);
exit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                MainActivity.this.finish();
            }
        });