在Android应用程序中使用意图展现另一个活动 [英] Using Intent in an Android application to show another activity

问题描述

在我的Andr​​oid应用程序，我有两个活动课。我对第一个按钮，我想说明的第二个被点击时，但我得到一个错误。下面是类：

In my Android application, I have two activity classes. I have a button on the first one and I want to show the second when it is clicked, but I get an error. Here are the classes:

public class FirstActivity extends Activity {

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button orderButton = (Button)findViewById(R.id.order);

    orderButton.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View view) {
        Intent intent = new Intent(FirstActivity.this, OrderScreen.class);
        startActivity(intent);
      }

    });
  }
}

这应显示被点击的按钮，但从来不会第二类：

The second class that should show when the button is clicked, but never does:

public class OrderScreen extends Activity {

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.order);

    Button orderButton = (Button) findViewById(R.id.end);

    orderButton.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View view) {
        finish();
      }

    });
  }
}

如何创建一个按钮，将显示第二个活动？

How do I create a button that will show the second activity?

推荐答案

这个问题是在 OrderScreen 活动未添加到<一个href="http://developer.android.com/guide/topics/manifest/manifest-intro.html">AndroidManifest.xml.有一次，我补充说，作为一个应用程序的节点，它的工作正常。

The issue was the OrderScreen Activity wasn't added to the AndroidManifest.xml. Once I added that as an application node, it worked properly.

<activity android:name=".OrderScreen" />

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