android自定义对话框错误

时间:2012-08-15 22:00:25

标签: android customdialog

我正在尝试创建自定义对话框,但我遇到了一些麻烦。

用户按下菜单按钮并选择一个选项后,将显示自定义对话框。

以下是代码:

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        MenuInflater myMenu = getMenuInflater();

        myMenu.inflate(R.menu.menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        switch (item.getItemId()) {
            case R.id.email:

                Context mContext = getApplicationContext();
                Dialog dialog = new Dialog(mContext);

                dialog.setContentView(R.layout.email);
                dialog.setTitle("Custom Dialog");

                dialog.show();

                break;
            case R.id.info:
                // Todo something
                break;
        }
        return super.onOptionsItemSelected(item);

    }

R.layout.email就是这样:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/emailTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="4dp"
        android:text="@string/emailTitle" />

    <MultiAutoCompleteTextView
        android:id="@+id/multiAutoCompleteTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="4dp" >

        <requestFocus />
    </MultiAutoCompleteTextView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="4" >

        <TextView
            android:id="@+id/emailTV1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <Button
            android:id="@+id/emailBsend"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:padding="4dp"
            android:text="@string/emailSend" />

        <Button
            android:id="@+id/emailBcancel"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:padding="4dp"
            android:text="@string/emailCancel" />

        <TextView
            android:id="@+id/emailTV2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </LinearLayout>

</LinearLayout>

我收到了这个错误:

android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

我做错了什么?

1 个答案:

答案 0 :(得分:1)

您不应该使用getApplicationContext。使用

Context mContext = [ActivityName].this;