单击设置“关于”按钮后，我试图打开一个关于对话框（从 DialogFragment 扩展）。
这是我的课程
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
public class AboutDialog extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.about_message)
.setPositiveButton(R.string.btn_accept, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// FIRE ZE MISSILES!
}
})
.setNegativeButton(R.string.btn_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
});
// Create the AlertDialog object and return it
return builder.create();
}
}
我需要将它添加到清单中吗？我相信我不应该
这是我的 SettingsActivity，目前可以完美运行
import android.content.Intent;
import android.os.*;
import android.preference.*;
import android.view.MenuItem;
public class SettingsActivity extends PreferenceActivity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
}
public static class MyPreferenceFragment extends PreferenceFragment
{
@Override
public void onCreate(final Bundle savedInstanceState){
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.prefs);
}
}
}
如何从 SettingsActivity 调用此对话框？
提前致谢。