Question

错误消息告诉我没有onButton1Click方法，但是在使用onButton1Click时我在之前的活动中从未得到过这个，所以idk是什么让这个场景有所不同。

java.lang.IllegalStateException: Could not find a method onButton1Click(View) in the activity class com.example.chiozokamalu.brainnoodles.Results1 for onClick handler on view class android.widget.Button with id 'homePageButton'
            at android.view.View$1.onClick(View.java:2131)
            at android.view.View.performClick(View.java:2485)
            at android.view.View$PerformClick.run(View.java:9080)
            at android.os.Handler.handleCallback(Handler.java:587)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3683)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoSuchMethodException: onButton1Click
            at java.lang.ClassCache.findMethodByName(ClassCache.java:247)
            at java.lang.Class.getMethod(Class.java:962)
            at android.view.View$1.onClick(View.java:2124)
            at android.view.View.performClick(View.java:2485)
            at android.view.View$PerformClick.run(View.java:9080)
            at android.os.Handler.handleCallback(Handler.java:587)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3683)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
            at dalvik.system.NativeStart.main(Native Method)

这是带有相应错误的类文件

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.view.View.OnClickListener;


public class Results1 extends MainActivity implements View.OnClickListener {
    TextView resultView1, resultView2, resultView3, resultView4, resultView5,
            resultView6, resultView7, resultView8, resultView9, resultView10;

Button homePageButton;

String[] correctA1 = {
        "2", //Array 0
        "1.25", //Array1
        "-1 degrees Fahrenheit", //Array 2
        "1 hour", //Array 3
        "12 months", //Array 4
        "100", //Array 5
        "They weigh the same", //Array 6
        "Their",//Array 7
        "More than 20", //Array 8
        "The denser the cloud, the darker the atmosphere"// Array 9


};



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.results1);


    resultView1 = ((TextView) findViewById(R.id.resultView1));
    resultView2 = ((TextView) findViewById(R.id.resultView2));
    resultView3 = ((TextView) findViewById(R.id.resultView3));
    resultView4 = ((TextView) findViewById(R.id.resultView4));
    resultView5 = ((TextView) findViewById(R.id.resultView5));
    resultView6 = ((TextView) findViewById(R.id.resultView6));
    resultView7 = ((TextView) findViewById(R.id.resultView7));
    resultView8 = ((TextView) findViewById(R.id.resultView8));
    resultView9 = ((TextView) findViewById(R.id.resultView9));
    resultView10 = ((TextView) findViewById(R.id.resultView10));

    resultView1.setText("1. " +correctA1[0]);
    resultView2.setText("2. " +correctA1[1]);
    resultView3.setText("3. " +correctA1[2]);
    resultView4.setText("4. " +correctA1[3]);
    resultView5.setText("5. " +correctA1[4]);
    resultView6.setText("6. " +correctA1[5]);
    resultView7.setText("7. " +correctA1[6]);
    resultView8.setText("8. " +correctA1[7]);
    resultView9.setText("9. " +correctA1[8]);
    resultView10.setText("10. " +correctA1[9]);
}

@Override public void onClick(View v) {
    homePageButton = ((Button) findViewById(R.id.homePageButton));
    homePageButton.setOnClickListener(this);
    boolean yes1 = true;
    boolean yes2 = true;

        startActivity(new Intent("android.intent.action.MAIN"));


}
}

Answer 1

检查您的＆＃34; homePageButton＆＃34;有一个在XML文件中定义的处理程序，即＆＃34; android：onClick＆＃34;

Answer 2

检查此活动的xml布局。您可能已将onButton1Click指定为视图的onClick处理程序，但未在您的活动中实现该方法。

Answer 3

你的布局文件（results1.xml）中有一个android：onClick =“onButton1Click”，但你的java代码中没有相应的方法来处理onclick。

修改Results1类代码并添加如下所示的方法：

public void onButton1Click(View v){
   //do something here
}

这可以解决您的问题。

我的应用在尝试加载新活动页面时崩溃了

3 个答案: