Java 单击图像时播放声音
我有一个图像,当你点击它时需要播放一个.wav文件。但是这个应用程序根本没有启动。我不知道为什么,因为它看起来我宣布了它需要的所有东西。但当我启动应用程序时,它会立即崩溃Java 单击图像时播放声音,java,android,soundpool,Java,Android,Soundpool,我有一个图像,当你点击它时需要播放一个.wav文件。但是这个应用程序根本没有启动。我不知道为什么,因为它看起来我宣布了它需要的所有东西。但当我启动应用程序时,它会立即崩溃 public class MainActivity extends Activity { private SoundPool soundPool; private int soundID; boolean loaded = false; @Override protected void onCreate(Bund
public class MainActivity extends Activity {
private SoundPool soundPool;
private int soundID;
boolean loaded = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ImageView view = (ImageView) findViewById(R.id.imageView1);
view.setOnTouchListener((OnTouchListener) this);
// Set the hardware buttons to control the music
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
// Load the sound
soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
@Override
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
loaded = true;
}
});
soundID = soundPool.load(this, R.raw.koe, 1);
}
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
// Getting the user sound settings
AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
float actualVolume = (float) audioManager
.getStreamVolume(AudioManager.STREAM_MUSIC);
float maxVolume = (float) audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
float volume = actualVolume / maxVolume;
// Is the sound loaded already?
if (loaded) {
soundPool.play(soundID, volume, volume, 1, 0, 1f);
Log.e("Test", "Played sound");
}
}
return false;
}
编辑
我想你必须这样做
// Declare as global variable
WebView mWebview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mylayoutfile);
Toast.makeText(this, "Laden van roosterwijzigingen.",
Toast.LENGTH_SHORT).show();
mWebview =(WebView) findviewById(R.id.webview_id);
// Enable JavaScript
mWebview.getSettings().setJavaScriptEnabled(true); // enable javascript
mWebview.loadUrl("http://divers.ommelandercollege.nl/webportalen/dagrooster.php");
}
LOGCAT
06-24 19:46:07.979: E/AndroidRuntime(10368): FATAL EXCEPTION: main
06-24 19:46:07.979: E/AndroidRuntime(10368): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.flikkema.robin.vleesapp/org.flikkema.robin.vleesapp.MainActivity}: java.lang.ClassCastException: org.flikkema.robin.vleesapp.MainActivity cannot be cast to android.view.View$OnTouchListener
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread.access$600(ActivityThread.java:130)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.os.Handler.dispatchMessage(Handler.java:99)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.os.Looper.loop(Looper.java:137)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread.main(ActivityThread.java:4745)
06-24 19:46:07.979: E/AndroidRuntime(10368): at java.lang.reflect.Method.invokeNative(Native Method)
06-24 19:46:07.979: E/AndroidRuntime(10368): at java.lang.reflect.Method.invoke(Method.java:511)
06-24 19:46:07.979: E/AndroidRuntime(10368): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
06-24 19:46:07.979: E/AndroidRuntime(10368): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
06-24 19:46:07.979: E/AndroidRuntime(10368): at dalvik.system.NativeStart.main(Native Method)
06-24 19:46:07.979: E/AndroidRuntime(10368): Caused by: java.lang.ClassCastException: org.flikkema.robin.vleesapp.MainActivity cannot be cast to android.view.View$OnTouchListener
06-24 19:46:07.979: E/AndroidRuntime(10368): at org.flikkema.robin.vleesapp.MainActivity.onCreate(MainActivity.java:24)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.Activity.performCreate(Activity.java:5008)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
06-24 19:46:07.979: E/AndroidRuntime(10368): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
06-24 19:46:07.979: E/AndroidRuntime(10368): ... 11 more
在调用
findViewById()之前,需要在onCreate()中调用setContentView(R.layout.your\u layout)
否则,当您试图膨胀图像视图时,它不知道要查找什么布局
因此:
@覆盖
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout);//完成ken wolf所说的操作后,可以在单击图像时播放声音
MediaPlayer mp = MediaPlayer.create(this, R.raw.myMusic);
imageClickable.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mp.start();
}
});
希望它有助于发布崩溃日志,我们将更好地为您提供帮助。更改为此视图。setOnTouchListener(此);
(删除对OnTouchListener的强制转换)并使您的活动实现OnTouchListener,因此公共类MainActivity扩展了Activity实现OnTouchListener{
。希望这是有意义的。然后呢?我可以找到演员阵容,但我不知道需要更改什么来查看。setOnTouchListener(此);但我已将onCreate
的第3行更改为view.setOnTouchListener(此);
并使您的MainActivity类在TouchListener上实现
MediaPlayer mp = MediaPlayer.create(this, R.raw.myMusic);
imageClickable.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mp.start();
}
});