按钮单击Android的碎片不工作 [英] Button click in Android Fragment does not work

问题描述

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:context=".MainActivity" >

<fragment
    android:id="@+id/fragment1"
    android:name="sithi.test.fragmenttest.Fragment1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

</RelativeLayout>

fragment1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Button"
    android:onClick="btnClick1" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

ActivityMain.java

public class MainActivity extends Activity {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

Fragment1.java

 @TargetApi(Build.VERSION_CODES.HONEYCOMB)
 public class Fragment1 extends Fragment
 {
    TextView tv;
    @Override
    public void onStart() 
    {
    // TODO Auto-generated method stub
    super.onStart();
    tv=(TextView)getView().findViewById(R.id.textView1);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
    {
    // TODO Auto-generated method stub
    //inflater.inflate(resource, root, attachToRoot);
    return inflater.inflate(R.layout.fragment1, container, false);
    }

    public void btnClick1(View view)
    {
    tv.setText("dsdsdasda");
    }


   }

我创建的XML文件和类这样的，但 btnClick1（）不能在Android的碎片的工作。 它会得到一个错误，当我点击的片段按钮。我写了按钮，点击功能片段类中。

I created xml files and classes like this but btnClick1() does not work in Android Fragment. It will getting an error when i clicking that button in the fragment. I have written that button click function inside the Fragment class.

推荐答案

您需要分配OnClickListener的片段code，使其工作。见Snicolas回答的为什么。

You need to assign OnClickListener in fragment code to make it work. See Snicolas answer for the "why".

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