如何在项目列表视图按钮点击时显示alertdialog [英] How to show alertdialog when clicking on button in item in list view
本文介绍了如何在项目列表视图按钮点击时显示alertdialog的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我曾尝试以下code ..
btnRemoveItem.setOnClickListener(新View.OnClickListener(){ @覆盖
公共无效的onClick(查看为arg0){
// TODO自动生成方法存根
束B =新包();
b.putLong(指数,item.id);
AlertDialog.Builder建设者=新AlertDialog.Builder(getApplicationContext());
builder.setTitle(你确定吗?);
builder.setMessage(你,你发售者想从购物车中删除这个项目吗?);
builder.setPositiveButton(否,新DialogInterface.OnClickListener(){
@覆盖
公共无效的onClick(DialogInterface对话,诠释它){
dialog.cancel();
} });
builder.setNegativeButton(是,新DialogInterface.OnClickListener(){
@覆盖
公共无效的onClick(DialogInterface对话,诠释它){ }
});
对话框DD = builder.create();
dd.show(); }
});
但我得到了下面的错误。
08-11 19:18:50.968:E / AndroidRuntime(827):致命异常:主要
08-11 19:18:50.968:E / AndroidRuntime(827):$ android.view.WindowManager BadTokenException:无法添加窗口 - 令牌null不是一个应用程序
08-11 19:18:50.968:E / AndroidRuntime(827):在android.view.ViewRoot.setView(ViewRoot.java:531)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.app.Dialog.show(Dialog.java:241)
08-11 19:18:50.968:E / AndroidRuntime(827):在com.gand.metro.uis.SearchActivity $ ItemsAdapter $ 1.onClick(SearchActivity.java:406)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.view.View.performClick(View.java:2485)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.view.View $ PerformClick.run(View.java:9080)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.os.Handler.handleCallback(Handler.java:587)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.os.Handler.dispatchMessage(Handler.java:92)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.os.Looper.loop(Looper.java:123)
08-11 19:18:50.968:E / AndroidRuntime(827):在android.app.ActivityThread.main(ActivityThread.java:3683)
08-11 19:18:50.968:E / AndroidRuntime(827):在java.lang.reflect.Method.invokeNative(本机方法)
08-11 19:18:50.968:E / AndroidRuntime(827):在java.lang.reflect.Method.invoke(Method.java:507)
08-11 19:18:50.968:E / AndroidRuntime(827):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839)
08-11 19:18:50.968:E / AndroidRuntime(827):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-11 19:18:50.968:E / AndroidRuntime(827):在dalvik.system.NativeStart.main(本机方法)
解决方案
只能使用活动上下文创建AlertDialogs,所以getApplicationContext()将无法工作。相反,下面的全局变量添加到您的活动文件:
上下文mContext;
然后将以下添加到您的onCreate():
mContext =这一点;
现在,更改:
AlertDialog.Builder建设者=新AlertDialog.Builder(getApplicationContext());
到
AlertDialog.Builder建设者=新AlertDialog.Builder(mContext);
I have tried the following code ..
btnRemoveItem.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Bundle b = new Bundle();
b.putLong("index", item.id);
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
builder.setTitle("Are you sure you ?");
builder.setMessage("Are you suer you want to remove this item from the cart?");
builder.setPositiveButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
Dialog dd= builder.create();
dd.show();
}
});
but I got the following error ..
08-11 19:18:50.968: E/AndroidRuntime(827): FATAL EXCEPTION: main
08-11 19:18:50.968: E/AndroidRuntime(827): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
08-11 19:18:50.968: E/AndroidRuntime(827): at android.view.ViewRoot.setView(ViewRoot.java:531)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.app.Dialog.show(Dialog.java:241)
08-11 19:18:50.968: E/AndroidRuntime(827): at com.gand.metro.uis.SearchActivity$ItemsAdapter$1.onClick(SearchActivity.java:406)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.view.View.performClick(View.java:2485)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.view.View$PerformClick.run(View.java:9080)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.os.Handler.handleCallback(Handler.java:587)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.os.Handler.dispatchMessage(Handler.java:92)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.os.Looper.loop(Looper.java:123)
08-11 19:18:50.968: E/AndroidRuntime(827): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-11 19:18:50.968: E/AndroidRuntime(827): at java.lang.reflect.Method.invokeNative(Native Method)
08-11 19:18:50.968: E/AndroidRuntime(827): at java.lang.reflect.Method.invoke(Method.java:507)
08-11 19:18:50.968: E/AndroidRuntime(827): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-11 19:18:50.968: E/AndroidRuntime(827): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-11 19:18:50.968: E/AndroidRuntime(827): at dalvik.system.NativeStart.main(Native Method)
解决方案
AlertDialogs can only be created using Activity contexts, so getApplicationContext() will not work. Instead, add the following global variable to your Activity file:
Context mContext;
And then add the following to your onCreate():
mContext = this;
Now, change:
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
to
AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
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