我有一个按钮,当我点击它时打开一个带有搜索栏的自定义对话框。单击该按钮后,我的应用程序崩溃,抛出NullPointerException。这是我的代码:
Dialog customDialog = new Dialog(RoomActivity.this);
customDialog.setTitle("Set value");
customDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
customDialog.setContentView(R.layout.bar_layout);
customDialog.show();
SeekBar seekBar = (SeekBar)findViewById(R.id.valueBar);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
s.setState(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
堆栈跟踪:
10-10 18:33:56.649 23833-23833/com.myapp.hussainchachuliya.myapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.myapp.hussainchachuliya.myapp, PID: 23833
java.lang.NullPointerException
at com.myapp.hussainchachuliya.myapp.Activities.RoomActivity$3.onLongClick(RoomActivity.java:180)
at android.view.View.performLongClick(View.java:4505)
at android.widget.TextView.performLongClick(TextView.java:8674)
at android.view.View$CheckForLongPress.run(View.java:18767)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:835)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:651)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:136)
at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分:0)
SeekBar seekBar = (SeekBar)customDialog.findViewById(R.id.valueBar);