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嗨，我是 android 开发新手，我正在创建一个带有按钮和动画的基本应用程序，但是，一个按钮与动画一起使用，但另一个按钮完全停止应用程序并且没有错误。Btn 1（按钮 1）工作，但 Btn 2（按钮 2）停止应用程序。java代码如下。任何帮助表示赞赏，在此先感谢。

public class MainActivity extends Activity {

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

           final Animation animAlpha = AnimationUtils.loadAnimation(this, R.anim.anim_alpha);

    Button btn1 = (Button) findViewById(R.id.categories);

    btn1.setOnClickListener(new Button.OnClickListener()
    {
        @Override
        public void onClick(View arg0) {
            arg0.startAnimation(animAlpha);
            Intent intent = new Intent(getApplicationContext(), Categories.class); 
            Vibrator  vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
            vibrator.vibrate(25);
            Button btn1= (Button) findViewById(R.id.categories);
            btn1.setBackgroundResource(R.drawable.button_shape2);
            startActivity(intent);

     Button btn2 = (Button) findViewById(R.id.feedback);

       btn2.setOnClickListener(new Button.OnClickListener()
    {
            @Override
            public void onClick(View arg0) {
                arg0.startAnimation(animAlpha);
                Intent intent = new Intent(getApplicationContext(), Feedback.class); 
                Vibrator  vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
                vibrator.vibrate(25);
                Button btn2= (Button) findViewById(R.id.feedback);
                btn2.setBackgroundResource(R.drawable.button_shape2);
                startActivity(intent);}
            });}{;

           };
       });}};

日志猫 

05-03 16:41:02.699: E/AndroidRuntime(24118): FATAL EXCEPTION: main
05-03 16:41:02.699: E/AndroidRuntime(24118): java.lang.IllegalStateException: Could not find a method Feedback(View) in the activity class com.android.motivateme3.MainActivity for onClick handler on view class android.widget.Button with id 'feedback'
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.view.View$1.onClick(View.java:3090)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.view.View.performClick(View.java:3574)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.view.View$PerformClick.run(View.java:14293)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.os.Handler.handleCallback(Handler.java:605)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.os.Handler.dispatchMessage(Handler.java:92)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.os.Looper.loop(Looper.java:137)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.app.ActivityThread.main(ActivityThread.java:4441)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at java.lang.reflect.Method.invokeNative(Native Method)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at java.lang.reflect.Method.invoke(Method.java:511)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at dalvik.system.NativeStart.main(Native Method)
05-03 16:41:02.699: E/AndroidRuntime(24118): Caused by: java.lang.NoSuchMethodException: Feedback [class android.view.View]
05-03 16:41:02.699: E/AndroidRuntime(24118):    at java.lang.Class.getConstructorOrMethod(Class.java:460)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at java.lang.Class.getMethod(Class.java:915)
05-03 16:41:02.699: E/AndroidRuntime(24118):    at android.view.View$1.onClick(View.java:3083)
05-03 16:41:02.699: E/AndroidRuntime(24118):    ... 11 more
05-03 16:41:03.889: I/Process(24118): Sending signal. PID: 24118 SIG: 9
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1 回答 1

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Caused by: java.lang.NoSuchMethodException: Feedback

您的 xml 是否提到 onClick，按钮应该调用方法反馈？因为这是问题所在，所以这个方法不存在，导致应用程序崩溃。

实施它来解决这个问题。

于 2013-05-03T16:04:47.770 回答