Question

请任何人都可以帮助我，因为我是android的新手我无法获得解决方案 - 如果我使用膨胀的布局，按钮OnClick事件不起作用。这是我的usemerge.xml代码，

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#2996ff" >
<LinearLayout
    android:id="@+id/i1" 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
   >
    </LinearLayout>
  </RelativeLayout>

toplayout.xml

   <LinearLayout 
   xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linear1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    >

     <Button
        android:id="@+id/butt1"
        android:layout_width="130dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="24dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="24dp"
        android:background="@drawable/mybutton" 
        android:text="@string/schedule" />
 </LinearLayout>

MainActivity.java

 private  LinearLayout lin1; 
  private Button bt1;
   protected void onCreate(Bundle savedInstanceState) {
      // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.usemerge);

     final LayoutInflater  inflater =       
    (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      lin1 = (LinearLayout)findViewById(R.id.i1);
        View vi=inflater.inflate(R.layout.toplayout,lin1,false);

        lin1.addView(vi);
        bt1=(Button)vi.findViewById(R.id.butt1);

        bt1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View vo) {
                // TODO Auto-generated method stub

                Intent ain=new Intent(getBaseContext(), ScheduleActivity.class);
                startActivity(ain); 
            }
        });

Answer 1

在AndroidManifest.xml中定义活动：

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

在将Button添加到LinearLayout之前设置单击侦听器：

public class MainActivity extends FragmentActivity {

    private LinearLayout lin1;
    private Button bt1;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.usemerge);

        lin1 = (LinearLayout) findViewById(R.id.i1);
        View vi = LayoutInflater.from(this).inflate(R.layout.toplayout, lin1, false);
        bt1 = (Button) vi.findViewById(R.id.butt1);
        bt1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View vo) {
                Intent ain = new Intent(MainActivity.this, ScheduleActivity.class);
                startActivity(ain);
            }
        });
        lin1.addView(vi);
    }

}

Answer 2

有两个问题......

首先，你已经注释了按钮的查找。

Button bt1=(Button)vi.findViewById(R.id.butt1);

第二个是你有onclick函数在匿名界面中调用活动的startActivity。你可以做两种解决方案。

首先在MainActivity类中实现onClickListener接口

class MainActivity extends Activity implements Button.onClickListener {
    //Your code Goes here...
      bt1.setOnClickListener(this);
    //Rest of your code

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

否则您也可以在onclick中执行以下操作：

Intent ain = new Intent(MainActivity.this, ScheduleActivity.class);
MainActivity.this.startActivity(ain);

Answer 3

请注意，您在开始时执行setContentView(R.layout.usemerge);，然后进行充气并将按钮绑定到充气视图，这意味着您无论如何都看不到充气的布局（您看到的按钮）屏幕上的膨胀视图不是 bt1 。

在给视图充气后，您应该setContentView(vi);。

Answer 4

在Activity

中定义AndroidManifest.xml

<activity android:name=".ScheduleActivity">

而不是getBaseContext()使用此行

Intent ain=new Intent(MainActivity.this, ScheduleActivity.class);

像这样实施界面OnClickListener

public class MainActivity extends Activity implements OnClickListener {
    private  LinearLayout lin1; 
      private Button bt1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
          // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

         final LayoutInflater  inflater =       
        (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          lin1 = (LinearLayout)findViewById(R.id.i1);
            View vi=inflater.inflate(R.layout.activity_sub,lin1,false);

            lin1.addView(vi);
            bt1=(Button)vi.findViewById(R.id.butt1);
            bt1.setOnClickListener(this);

    }
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
         Intent ain=new Intent(MainActivity.this, SubActivity.class);
         startActivity(ain); 
    }
}

Answer 5

在膨胀之后添加setContentView(vi);，然后移除setContentView(R.layout.usemerge);

Answer 6

您的MainActivity.java应如下所示：

LinearLayout lin1;
Button bt1;

 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.usemerge);

 LayoutInflater inflater = getLayoutInflater().inflate(R.layout.toplayout, null, true);
 bt1 = inflater.findViewById(R.id.butt1);

 lin1 = (LinearLayout)findViewById(R.id.i1);
 View vi=inflater.inflate(R.layout.toplayout,lin1,false);

    lin1.addView(vi);

    bt1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View vo) {
            // TODO Auto-generated method stub

            Intent ain=new Intent(getBaseContext(), ScheduleActivity.class);
            startActivity(ain); 
        }
    });

使用充气布局时，按钮单击事件不起作用

6 个答案: