Android动态创建的适配器列表视图中的getText

Question

我有一个自定义适配器列表视图。其布局如下

RelativeLayout 
    LinearLayout 
     TextView 
     Button 

需要在该按钮上添加单击事件。在这种情况下，需要从该TextView获取文本并将其传递给下一个活动。

我得到了下面的代码

holder.btn.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View vp) { 

     LinearLayout rl = (LinearLayout)vp.getParent(); 
     TextView tv = (TextView)rl.findViewById(R.id.name); 
     String text = tv.getText().toString(); 

    } 
}); 

但它崩溃的String text = tv.getText().toString();

任何想法？

更新

01-17 19:59:12.877: E/AndroidRuntime(16659): FATAL EXCEPTION: main 
01-17 19:59:12.877: E/AndroidRuntime(16659): Process: com.atc.detectoract, PID: 16659 
01-17 19:59:12.877: E/AndroidRuntime(16659): java.lang.NullPointerException 
01-17 19:59:12.877: E/AndroidRuntime(16659): at com.atc.detectoract.CustomAdapter$2.onClick(CustomAdapter.java:129) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.view.View.performClick(View.java:4438) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.view.View$PerformClick.run(View.java:18422) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.os.Handler.handleCallback(Handler.java:733) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.os.Handler.dispatchMessage(Handler.java:95) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.os.Looper.loop(Looper.java:136) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at android.app.ActivityThread.main(ActivityThread.java:5017) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at java.lang.reflect.Method.invokeNative(Native Method) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at java.lang.reflect.Method.invoke(Method.java:515) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
01-17 19:59:12.877: E/AndroidRuntime(16659): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

But it is crashing on String text = tv.getText().toString(); 

你有NullPointerException。 tv为空

您可以使用setTag和getTag。

holder.btn.setTag(holder.tv.getText().toString()); // set tag 

然后

holder.btn.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View vp) { 

     String value = (String)vp.getTag(); // get tag 

    } 
});