应用程序需要两个权限:
应用程序有以下屏幕:
屏幕A:启动(根据权限状态处理屏幕导航)
屏幕B:权限屏幕(如果用户未授予电话权限)
屏幕C:条款&条件屏幕
当它启动时,App将检查是否授予了电话许可。如果被授予,app将打开屏幕C,否则它将保留在同一屏幕B上。
步骤:
我可以使用' CLEAR_TASK' 和' CLEAR_TOP' 标志和startActivity,目的是了解我们的应用程序会发生什么当用户更改时,设置权限。
观察:
当用户授予权限时,我们的申请流程将无效。
当用户删除授予的权限时,Android应用会终止并重启应用。 (如果发生这种情况,那么为什么有两个T& C屏幕实例?)
我在这里有点困惑!!
答案 0 :(得分:1)
@AndiGeeky以下是一些完整的代码,用于通知用户是否选择了“允许”或“拒绝”,并且它将管理用户选择“永不再问”或用户在允许不允许的情况下更改设置的其他两个方案
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
//.... write file into storage ...
System.out.println("SDK > BuildVersion TRUE");
} else {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 666); // Comment 26
System.out.println("go to requestPermissions");
}
}
onLoad();
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case 666: // Allowed was selected so Permission granted
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Snackbar s = Snackbar.make(findViewById(android.R.id.content),"Permission Granted",Snackbar.LENGTH_LONG);
View snackbarView = s.getView();
TextView textView = (TextView) snackbarView.findViewById(android.support.design.R.id.snackbar_text);
textView.setTextColor(Color.RED);
textView.setTextSize(18);
textView.setMaxLines(6);
s.show();
// do your work here
} else if (Build.VERSION.SDK_INT >= 23 && !shouldShowRequestPermissionRationale(permissions[0])) {
// User selected the Never Ask Again Option Change settings in app settings manually
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setTitle("Change Permissions in Settings");
alertDialogBuilder
.setMessage("" +
"\nClick SETTINGS to Manually Set\n"+"Permissions to use Database Storage")
.setCancelable(false)
.setPositiveButton("SETTINGS", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", getPackageName(), null);
intent.setData(uri);
startActivityForResult(intent, 1000); // Comment 3.
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
} else {
// User selected Deny Dialog to EXIT App ==> OR <== RETRY to have a second chance to Allow Permissions
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setTitle("Second Chance");
alertDialogBuilder
.setMessage("Click RETRY to Set Permissions to Allow\n\n"+"Click EXIT to the Close App")
.setCancelable(false)
.setPositiveButton("RETRY", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, Integer.parseInt(WRITE_EXTERNAL_STORAGE));
Intent i = new Intent(MainActivity.this,MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
}
})
.setNegativeButton("EXIT", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
dialog.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
}
break;
}};
答案 1 :(得分:0)
/**** If user changes, permission from settings it will again ask for permission to
granted.You should always check if user changes permission from settings
using below code ***/
if(checkSelfPermission(Manifest.permission.your_permission_name) == PackageManager.PERMISSION_GRANTED)