我有一个自定义对话框。所以一个按钮单击我显示它。现在我有一个按钮在自定义对话框中我想关闭它按一下该按钮,但它是抛出任何空指针exception.Here是我的代码,我使用,以显示它:在Android中点击按钮关闭一个自定义对话框
private void showPreConfirmationDialog() {
final Dialog dialog= new Dialog(context);;
button = (ImageView) findViewById(R.id.bookButton);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
dialog.setContentView(R.layout.pre_confirmation_dailog);
//dialog.setCancelable(false);
dialog.setTitle("OnWard Details...");
dialog.show();
}
});
backPreConfirmation = (ImageView)dialog.findViewById(R.id.backImage);
backPreConfirmation.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
dialog.dismiss();
}
});
}
在backPreConfirmation按钮,点击它抛出我的这个错误:
07-30 09:25:15.830: E/AndroidRuntime(26599): FATAL EXCEPTION: main
07-30 09:25:15.830: E/AndroidRuntime(26599): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.result/com.android.result.Result}: java.lang.NullPointerException
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.os.Looper.loop(Looper.java:137)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-30 09:25:15.830: E/AndroidRuntime(26599): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 09:25:15.830: E/AndroidRuntime(26599): at java.lang.reflect.Method.invoke(Method.java:511)
07-30 09:25:15.830: E/AndroidRuntime(26599): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-30 09:25:15.830: E/AndroidRuntime(26599): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-30 09:25:15.830: E/AndroidRuntime(26599): at dalvik.system.NativeStart.main(Native Method)
07-30 09:25:15.830: E/AndroidRuntime(26599): Caused by: java.lang.NullPointerException
07-30 09:25:15.830: E/AndroidRuntime(26599): at com.android.result.Result.showPreConfirmationDialog(Result.java:66)
07-30 09:25:15.830: E/AndroidRuntime(26599): at com.android.result.Result.onCreate(Result.java:41)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.Activity.performCreate(Activity.java:5104)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-30 09:25:15.830: E/AndroidRuntime(26599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-30 09:25:15.830: E/AndroidRuntime(26599): ... 11 more
我有什么错了,请让我知道
我做了同样的变化还是同样的问题.same错误在错误日志 – Developer
移动'dialog.show()'按钮点击收听外面 – Raghunandan
按钮在主布局和backPreConfirmation在preconformation对话框布局 – Developer