我想向主要活动类的getversion方法方法显示一个Alert Dialog非活动类，但每当我通过该方法调用AlertDialog时，它会生成带有以下文本的错误
public void AlertUpgrade(Activity activity) {
Log.e("AlertUpgrade", "Communicator.");
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setMessage(" Click OK to Upgrade Now ? ")
.setPositiveButton("OK" +
"", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.e("onClick", "AlertUpgrade");
Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=gsip.webgalaxy"));
marketIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET|Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
app_context.startActivity(marketIntent);
}
}).setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
return false;
}
return true;
}
});
builder.create().show();
}
public void AlertUpdate(Activity activity) {
Log.e("AlertUpdate", "Communicator.....");
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setMessage("There is newer version of this application available, click OK to update now?").setPositiveButton("OK" +
"", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.e("onClick", "AlertUpdate");
Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("url"));
marketIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET|Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
app_context. startActivity(marketIntent);
}
}).setNegativeButton("Remind Later", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
}).setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
return false;
}
return true;
}
});
builder.create().show();
}
错误记录
04-03 09:04:44.007: E/AndroidRuntime(2249): java.lang.RuntimeException: Unable to start activity ComponentInfo{gsip.webgalaxy/gsip.webgalaxy.ui.MainActivity}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread.access$800(ActivityThread.java:135)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.os.Handler.dispatchMessage(Handler.java:102)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.os.Looper.loop(Looper.java:136)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread.main(ActivityThread.java:5017)
04-03 09:04:44.007: E/AndroidRuntime(2249): at java.lang.reflect.Method.invokeNative(Native Method)
04-03 09:04:44.007: E/AndroidRuntime(2249): at java.lang.reflect.Method.invoke(Method.java:515)
04-03 09:04:44.007: E/AndroidRuntime(2249): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
04-03 09:04:44.007: E/AndroidRuntime(2249): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
04-03 09:04:44.007: E/AndroidRuntime(2249): at dalvik.system.NativeStart.main(Native Method)
04-03 09:04:44.007: E/AndroidRuntime(2249): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.view.ViewRootImpl.setView(ViewRootImpl.java:540)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:259)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.Dialog.show(Dialog.java:286)
04-03 09:04:44.007: E/AndroidRuntime(2249): at gsip.webgalaxy.ui.Communicator.getversion(Communicator.java:226)
04-03 09:04:44.007: E/AndroidRuntime(2249): at gsip.webgalaxy.ui.MainActivity.onCreate(MainActivity.java:460)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.Activity.performCreate(Activity.java:5231)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
04-03 09:04:44.007: E/AndroidRuntime(2249): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
04-03 09:04:44.007: E/AndroidRuntime(2249): ... 11 more
04-03 09:09:44.177: I/Process(2249): Sending signal. PID: 2249 SIG: 9
答案 0 :(得分：2)
一种可能性是在启动另一个Activity时指定一些额外内容，然后在目标Activity中截取这些额外内容并相应地显示AlertDialog。
像这样......
来源 Activity：
Intent intent = new Intent(this, TargetActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("alert_icon_res_id", android.R.drawable.ic_dialog_info);
bundle.putString("alert_title", "Some Title");
bundle.putString("alert_message", "Some message");
intent.putExtras(bundle);
startActivity(intent);
目标 Activity：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle b = getIntent().getExtras();
if (b != null && b.containsKey("alert_icon_res_id")) {
int icon = b.getInt("alert_icon_res_id");
int title = b.getString("alert_title");
int message = b.getString("alert_message");
new AlertDialog.Builder(this).setIcon(icon)
.setTitle(title).setMessage(message)
.setPositiveButton(R.string.edit_dialog_ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).create().show());
}
}
答案 1 :(得分：0)
您需要Activity Context对话框。如果您要从非活动类中显示它，请将对Activity的引用作为参数传递。