嗨,我有名单,我有本地音乐文件。当我点击我的列表项目时,我想播放我的音乐文件。 继承人我的onclick列表项如下:从列表视图播放音乐
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position)
{
case 0:
v.contentEquals("file:///android_asset/disco.mp3");
playSound(v);
case 1:
v.contentEquals("file:///android_asset/disco.mp3");
playSound(v);
break;
};
}
和我的继承人媒体播放器看起来像:
private void playSound(String v) {
// TODO Auto-generated method stub
try {
mp.setDataSource(v);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();
}
,当我在列表中的项目计划冻结单击并强制关闭。 我该怎么办?
logcatoutput
01-11 23:19:19.191:E/AndroidRuntime(4811):致命异常:主 01-11 23:19:19.191:E/AndroidRuntime(4811):JAVA。 lang.NullPointerException 01-11 23:19:19.191:E/AndroidRuntime(4811):at com.hmomeni.customlistview.MainActivity $ 11.onItemClick(MainActivity.java:113) 01-11 23:19:19.191:E/AndroidRuntime(4811):在android.widget.AdbterView.performItemClick(AdapterView.java:301) 01-11 23:19:19.191:E/AndroidRuntime(4811):在android.widget.AbsListView.performItemClick(AbsListView.java: 1519) 01-11 23:19:19.191:E/AndroidR (4811):at android.widget.AbsListView $ PerformClick.run(AbsListView.java:3291) 01-11 23:19:19.191:E/AndroidRuntime(4811):at android.widget.AbsListView $ 1.run(AbsListView .java:4340) 01-11 23:19:19.191:E/AndroidRuntime(4811):at android.os.Handler.handleCallback(Handler.java:725) 01-11 23:19:19.191:E/AndroidRuntime (4811):at android.os.Handler.dispatchMessage(Handler.java:92) 01-11 23:19:19.191:E/AndroidRuntime(4811):at android.os.Looper.loop(Looper.java:137 ) 01-11 23:19:19.191:E/AndroidRuntime(4811):at android.app.ActivityThread.main(ActivityThread.java:5328) 01-11 23:19:19.191:E/AndroidRuntime(4811)在java.lang.reflect.Method.invokeNative(Native Method) 01-11 23:19:19.191:E/AndroidRuntime(4811):at java.lang.reflect.Method.invoke(Method.java: 511) 01-11 23:19:19.191:E/AndroidRuntime(4811):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1102) 01-11 23:19:19.191: E/AndroidRuntime(4811):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 01-11 23:19:19.191:E/AndroidRuntime(4811):at dalvik.system.NativeStart。 main(Native Method)
你应该做的是粘贴你的筹码跟踪并向我们展示您的错误。谢谢 –
也许是由文件寻址造成的,你可以发布你的Log dada? – FxRi4
logcat添加了@FxRi4 – Soheyl