对话框问题:添加内容前必须调用requestFeature()

Dialog problem: requestFeature() must be called before adding content(对话框问题:添加内容前必须调用requestFeature())

问题描述

我正在创建一个包含 EditText 的自定义对话框，以便我可以从用户那里获取文本数据:

I'm creating a custom dialog containing an EditText so that I can get text data from the user:

final EditText newKey = (EditText) findViewById(R.id.dialog_result);
AlertDialog.Builder keyBuilder = new AlertDialog.Builder(StegDroid.this);
keyBuilder
.setCancelable(false)
.setPositiveButton("Try Again", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int id) {
        Log.v("Dialog","New Key: "+newKey.getText().toString());
    }
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialog, int id) {
            dialog.cancel();
       }
   });
AlertDialog dialog = keyBuilder.create();
dialog.setTitle("Decryption Failed");
dialog.setContentView(R.layout.decrypt_failed_dialog);
dialog.show();

但是我总是遇到这个异常:

However I always get this exception:

01-11 18:49:00.507: ERROR/AndroidRuntime(3461): android.util.AndroidRuntimeException: requestFeature() must be called before adding content
01-11 18:49:00.507: ERROR/AndroidRuntime(3461):     at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:181)
01-11 18:49:00.507: ERROR/AndroidRuntime(3461):     at com.android.internal.app.AlertController.installContent(AlertController.java:199)
01-11 18:49:00.507: ERROR/AndroidRuntime(3461):     at android.app.AlertDialog.onCreate(AlertDialog.java:251)

...

在 dialog.show() 行.我应该怎么做才能摆脱这种情况?

at the line of dialog.show(). What should I be doing to get rid of this?

推荐答案

你需要在创建对话框之前设置自定义视图.如果您使用 AlertDialogsetView(View) 而不是 setContentView()>.

You need to set the custom view before creating the dialog. Also you need to use setView(View) instead of setContentView() if you are using the default positive and negative buttons provided for you by the AlertDialog.

final EditText newKey = (EditText) findViewById(R.id.dialog_result);
AlertDialog.Builder keyBuilder = new AlertDialog.Builder(StegDroid.this);
keyBuilder
.setCancelable(false)
.setPositiveButton("Try Again", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int id) {
        Log.v("Dialog","New Key: "+newKey.getText().toString());
    }
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialog, int id) {
            dialog.cancel();
       }
   });
keyBuilder.setTitle("Decryption Failed");
keyBuilder.setView(getLayoutInflater().inflate(R.layout.decrypt_failed_dialog, null));
AlertDialog dialog = keyBuilder.create();
dialog.show();

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