我正在尝试编写一个单击图像时将播放声音剪辑的应用程序。剪辑长约1秒。每当打开应用程序时,它就会强制关闭。这是我的编码。为什么会强制关闭?
主要活动
package com.jeremy.vroom;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.media.MediaPlayer;
import android.widget.Button;
import android.view.View.OnClickListener;
import android.view.View;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button zero = (Button)this.findViewById(R.id.btnZero);
zero.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
new Thread(){
public void run(){
MediaPlayer mp = MediaPlayer.create(MainActivity.this, R.raw.rev);
mp.start();
}
}.start();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
activitymain.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/btnZero"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/uro5"
android:clickable="true"
android:contentDescription="@string/desc" ></ImageView>
记录
08-03 17:21:29.156: D/AndroidRuntime(272): Shutting down VM
08-03 17:21:29.156: W/dalvikvm(272): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-03 17:21:29.298: E/AndroidRuntime(272): FATAL EXCEPTION: main
08-03 17:21:29.298: E/AndroidRuntime(272): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jeremy.vroom/com.jeremy.vroom.MainActivity}: java.lang.ClassCastException: android.widget.ImageView
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.os.Handler.dispatchMessage(Handler.java:99)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.os.Looper.loop(Looper.java:123)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-03 17:21:29.298: E/AndroidRuntime(272): at java.lang.reflect.Method.invokeNative(Native Method)
08-03 17:21:29.298: E/AndroidRuntime(272): at java.lang.reflect.Method.invoke(Method.java:521)
08-03 17:21:29.298: E/AndroidRuntime(272): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-03 17:21:29.298: E/AndroidRuntime(272): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-03 17:21:29.298: E/AndroidRuntime(272): at dalvik.system.NativeStart.main(Native Method)
08-03 17:21:29.298: E/AndroidRuntime(272): Caused by: java.lang.ClassCastException: android.widget.ImageView
08-03 17:21:29.298: E/AndroidRuntime(272): at com.jeremy.vroom.MainActivity.onCreate(MainActivity.java:18)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-03 17:21:29.298: E/AndroidRuntime(272): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-03 17:21:29.298: E/AndroidRuntime(272): ... 11 more
08-03 17:21:32.588: I/Process(272): Sending signal. PID: 272 SIG: 9
预先感谢您的任何帮助
最佳答案
使用
ImageView zero = (ImageView)findViewById(R.id.btnZero);
代替
Button zero = (Button)this.findViewById(R.id.btnZero);
关于java - Android-单击按钮后播放声音-强制关闭,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/11800565/