在Android TV(Leanback)应用程序中,可以使用片段(Fragment)和自定义对话框来创建类似于AlertDialog的权限对话框。以下是一个解决方法的示例代码:
public class CustomDialogFragment extends DialogFragment {
private static final String ARG_TITLE = "title";
private static final String ARG_MESSAGE = "message";
private static final String ARG_POSITIVE_BUTTON = "positive_button";
private static final String ARG_NEGATIVE_BUTTON = "negative_button";
private static final String ARG_PERMISSION = "permission";
private String title;
private String message;
private String positiveButton;
private String negativeButton;
private String permission;
public static CustomDialogFragment newInstance(String title, String message, String positiveButton,
String negativeButton, String permission) {
CustomDialogFragment fragment = new CustomDialogFragment();
Bundle args = new Bundle();
args.putString(ARG_TITLE, title);
args.putString(ARG_MESSAGE, message);
args.putString(ARG_POSITIVE_BUTTON, positiveButton);
args.putString(ARG_NEGATIVE_BUTTON, negativeButton);
args.putString(ARG_PERMISSION, permission);
fragment.setArguments(args);
return fragment;
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
title = getArguments().getString(ARG_TITLE);
message = getArguments().getString(ARG_MESSAGE);
positiveButton = getArguments().getString(ARG_POSITIVE_BUTTON);
negativeButton = getArguments().getString(ARG_NEGATIVE_BUTTON);
permission = getArguments().getString(ARG_PERMISSION);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(title)
.setMessage(message)
.setPositiveButton(positiveButton, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// 请求权限
requestPermission(permission);
}
})
.setNegativeButton(negativeButton, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// 用户拒绝权限,关闭对话框
dialog.dismiss();
}
});
return builder.create();
}
private void requestPermission(String permission) {
// 请求权限的代码
}
}
public class MainActivity extends FragmentActivity {
private static final String TAG_DIALOG = "dialog";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 检查是否有权限
if (!hasPermission()) {
// 显示权限对话框
showPermissionDialog();
}
}
private boolean hasPermission() {
// 检查权限的代码
return false;
}
private void showPermissionDialog() {
CustomDialogFragment dialog = CustomDialogFragment.newInstance(
"权限请求",
"需要获取您的位置信息以提供更好的服务,是否允许?",
"允许",
"拒绝",
Manifest.permission.ACCESS_FINE_LOCATION);
FragmentManager fragmentManager = getSupportFragmentManager();
dialog.show(fragmentManager, TAG_DIALOG);
}
}
上述代码中,CustomDialogFragment类继承自DialogFragment,用于创建自定义对话框。在onCreateDialog()方法中,使用AlertDialog.Builder来创建对话框,并设置标题、消息和按钮的点击事件。通过newInstance()方法传递参数给CustomDialogFragment类。在活动中,通过showPermissionDialog()方法来显示权限对话框。
注意:在真实的应用程序中,需要根据实际的权限需求和逻辑进行相应的修改。