java - 一键执行两项操作

Question

我开始盯着 Eclipse 和 Java 的东西。我的应用程序有问题。我想制作一个按钮来执行两种不同的操作:旋转、缩放。不幸的是，当我按下该按钮时，应用程序已停止。这是我的代码，请需要一些建议:

Main Activity


package com.example.ksztalty;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.*;


public class MainActivity extends Activity {

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

    }



public void stosuj_wszystko(View v)

 {
    Animation a = AnimationUtils.loadAnimation(this, R.anim.wszystko_razem);
    ImageView iv = (ImageView)findViewById(R.id.imageView1);
    iv.startAnimation(a);
 }    


public void obracaj(View v)
{
    Animation a = AnimationUtils.loadAnimation(this, R.anim.obrot);
    ImageView iv = (ImageView)findViewById(R.id.imageView1);
    iv.startAnimation(a);


}

public void skaluj(View v)

{
    Animation a = AnimationUtils.loadAnimation(this, R.anim.skalowanie);
    ImageView iv = (ImageView)findViewById(R.id.imageView1);
    iv.startAnimation(a);


}



}

和我的 xml 文件

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <rotate
    android:fromDegrees="0"
    android:toDegrees="720"
    android:duration="1000"
    android:pivotX="50%"
    android:pivotY="50%"/>

    <scale 
    android:fromXScale="1.0"
    android:toXScale="2.0"
    android:fromYScale="1.0"
    android:toYScale="2.0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:duration="1000"/>


</set>

Activity :

<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="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <ImageView 
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="150dp"
        android:layout_marginTop="150dp"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/rybka1"

        />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="25dp"
        android:layout_marginTop="31dp"
        android:text="Obrót"
        android:onClick="obracaj" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button1"
        android:layout_alignBottom="@+id/button1"
        android:layout_toRightOf="@+id/button1"
        android:text="Skala"
        android:onClick="skaluj" />

   <Button 
       android:id="@+id/button3"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_alignBaseline="@+id/button1"
       android:layout_toRightOf="@+id/button2"
       android:onClick="zanikaj"
       android:text="Zanik"/>

   <Button
      android:id="@+id/button4"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@+id/button2"
      android:layout_alignLeft="@+id/button1"
      android:layout_alignRight="@+id/button3"
      android:onClick="stosuj wszystko"
      android:text="Wszystko razem" />

</RelativeLayout>

和错误日志:

11-08 10:43:47.605: E/AndroidRuntime(11645): FATAL EXCEPTION: main
11-08 10:43:47.605: E/AndroidRuntime(11645): Process: com.example.ksztalty, PID: 11645
11-08 10:43:47.605: E/AndroidRuntime(11645): java.lang.IllegalStateException: Could not find a method stosuj wszystko(View) in the activity class com.example.ksztalty.MainActivity for onClick handler on view class android.widget.Button with id 'button4'
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.view.View$1.onClick(View.java:4240)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.view.View.performClick(View.java:5197)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.view.View$PerformClick.run(View.java:20926)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.os.Handler.handleCallback(Handler.java:739)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.os.Handler.dispatchMessage(Handler.java:95)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.os.Looper.loop(Looper.java:145)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.app.ActivityThread.main(ActivityThread.java:5942)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at java.lang.reflect.Method.invoke(Native Method)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at java.lang.reflect.Method.invoke(Method.java:372)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
11-08 10:43:47.605: E/AndroidRuntime(11645): Caused by: java.lang.NoSuchMethodException: stosuj wszystko [class android.view.View]
11-08 10:43:47.605: E/AndroidRuntime(11645):    at java.lang.Class.getMethod(Class.java:665)
11-08 10:43:47.605: E/AndroidRuntime(11645):    at android.view.View$1.onClick(View.java:4233)
11-08 10:43:47.605: E/AndroidRuntime(11645):    ... 10 more

Answer 1

您的方法名称是 stosuj_wszystko并且您在 .xml 文件中的 button4 的 onClick 方法上设置了“stosuj wszystko”，只需输入该方法的正确名称即可。