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我在我的应用程序中使用mediaplayer(mp3铃声)。我的应用程序工作正常,但我看到在谷歌Play开发者控制台(仅适用于某些用户)错误报告哪里出了问题,我不知道,谢谢你(我测试的每一个声音)Mediaplayer NullPointerException
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
soundname= new String[] {"Sound1","Sound2","Sound3","Sound4","Sound5","Sound6"};
soundfile= new int[] {R.raw.sound1,R.raw.sound2,R.raw.sound3,R.raw.sound4,R.raw.sound5,R.raw.sound6};
this.setContentView(R.layout.single_list_item_view);
TextView txtProduct = (TextView) findViewById(R.id.product_label);
Intent intent = getIntent();
int position = intent.getExtras().getInt("position");
txtProduct.setText(soundname[position]);
mediaPlayer = MediaPlayer.create(this, soundfile[position]);
Button btnplay= (Button) findViewById(R.id.btnoynat);
btnplay.setOnClickListener(new View.OnClickListener(){
public void onClick(View arg0) {
mediaPlayer.start();
}
});
错误日志; (mediaPlayer.start(); - > SingleListItem.java:60)
java.lang.NullPointerException
at com.zilsesleri.SingleListItem$1.onClick(SingleListItem.java:60)
at android.view.View.performClick(View.java:2538)
at android.view.View$PerformClick.run(View.java:9152)
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:3693)
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:907)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
at dalvik.system.NativeStart.main(Native Method)
您的mediaPlayer值为空。检查MediaPlayer.create的返回值,并查看它是否返回null。它在任何错误上都会这样做。最有可能你的资源不好,但如果你有太多以前未发布的媒体播放器,也可能导致问题。 –
也许这发生在人们点击“太快”之前,您的媒体播放器加载?那么在调用之前,您应该看看您的媒体播放器是否准备就绪。 – psykhi