今天我收到了NullPointerException
一份报告。我无法在自己的手机上重现此 NullPointerException。
我真的找不到导致 NullPointerException 的原因。
这是报告:
java.lang.NullPointerException
at com.dsf.sdf.ManActivity$25.onTouch(ManActivity.java:445)
at android.view.View.dispatchTouchEvent(View.java:3762)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936)
at com.android.internal.policy.impl.PhoneWindow$DecorView.
(PhoneWindow.java:1674)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1109)
at android.app.Activity.dispatchTouchEvent(Activity.java:2086)
at com.android.internal.policy.impl.PhoneWindow$DecorView.
dispatchTouchEvent(PhoneWindow.java:1658)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1785)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.
run(ZygoteInit.java:876)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
at dalvik.system.NativeStart.main(Native Method)
这是第 936 行的代码:
sdff.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
sdff.setBackgroundDrawable(getResources().
getDrawable(R.drawable.pressed));
}
else if (event.getAction() == MotionEvent.ACTION_UP) {
if (play != null) {
play.reset();
play.release();
}
play = MediaPlayer.create(ManActivity.this,
R.raw.sdff);
play.start();
sdff.setBackgroundDrawable(getResources().
getDrawable(R.drawable.button));
}
else if (event.getAction() == MotionEvent.ACTION_CANCEL) {
sdff.setBackgroundDrawable(getResources().
getDrawable(R.drawable.button));
}
return false;
}
});
这是一个简单的按钮,按下时会发出声音。
那么是什么导致了异常呢?
编辑:
Code at line 445:
play = MediaPlayer.create(ManActivity.this,
R.raw.bf);
play.start();
auth.setBackgroundDrawable(getResources().getDrawable(
R.drawable.button));