Android 写入设置权限不明确
我正在为android 6.0棉花糖构建我的应用程序，它需要写入设置权限。搜索之后，我知道，称之为：Android 写入设置权限不明确,android,android-6.0-marshmallow,Android,Android 6.0 Marshmallow,我正在为android 6.0棉花糖构建我的应用程序，它需要写入设置权限。搜索之后，我知道，称之为： requestPermissions(new String[]{Manifest.permission.WRITE_SETTINGS}, 101); 不会显示对话框权限。所以，根据解决方案，我们应该检查Settings.System.canWrite（） 返回true或false。因此，我应该将带有ACTION\u MANAGE\u WRITE\u设置的活动调用为A
requestPermissions(new String[]{Manifest.permission.WRITE_SETTINGS},
101);
Settings.System.canWrite（）ACTION\u MANAGE\u WRITE\u设置的活动调用为ACTION
但问题是，当我调用此活动时，它显示我的应用程序已被授予权限，尽管方法Settings.System.canWrite（）
返回false
我在这里遗漏了什么，或者我必须禁用它，然后再启用它。我在为android 6开发时遇到了类似的问题。这是因为，现在开发人员必须在运行时请求权限。我的解决方案就在这里-
在onCreate中，显示权限对话框。假设该方法的名称为showPermissionsDialog（）
//Global variable request code
private static final int WRITE_PERMISSION_REQUEST = 5000;
private void showPermissionsDialog() {
if (Build.VERSION.SDK_INT == 23) {
int hasWriteSettingsPermission = checkSelfPermission(Manifest.permission.WRITE_SETTINGS);
if (hasWriteSettingsPermission != PackageManager.PERMISSION_GRANTED) {
//You can skip the next if block. I use it to explain to user why I wan his permission.
if (!ActivityCompat.shouldShowRequestPermissionRationale(HomeActivity.this, Manifest.permission.ACCESS_FINE_LOCATION)) {
showMessageOKCancel("You need to allow write settings",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(HomeActivity.this, new String[]{Manifest.permission.WRITE_SETTINGS}, WRITE_PERMISSION_REQUEST);
}
});
return;
}
//The next line causes a dialog to popup, asking the user to allow or deny us write permission
ActivityCompat.requestPermissions(HomeActivity.this, new String[]{Manifest.permission.WRITE_SETTINGS}, WRITE_PERMISSION_REQUEST);
return;
} else {
//Permissions have already been granted. Do whatever you want :)
}
}
}
//Now you only need this if you want to show the rationale behind
//requesting the permission.
private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(HomeActivity.this).setMessage(message).setPositiveButton("OK", okListener)
.setNegativeButton("Cancel", null).show();
}
//This method is called immediately after the user makes his decision to either allow
// or disallow us permision.
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case WRITE_PERMISSION_REQUEST:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//User pressed the allowed button
//Do what you want :)
} else {
//User denied the permission
//Come up with how to hand the requested permission
}
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
在使用Android 6.0.1（MMB29S）的Nexus 6上，以下代码：
if (!Settings.System.canWrite(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
intent.setData(Uri.parse("package:dummy"));
startActivity(intent);
}
仅当“允许修改系统设置”设置为“禁用”时，才会打开设置。例如，在新安装后首次启动时（即不重新安装）
编辑（请参阅注释）：某些设备可能与此代码有关，在这些设备中，canWrite（）
始终返回false
，无论设置值如何
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (Settings.System.canWrite(context)) {
//Write code to feature for eg. set brightness or vibrate device
/* ContentResolver cResolver = context.getContentResolver();
Settings.System.putInt(cResolver, Settings.System.SCREEN_BRIGHTNESS,brightness);*/
}
else {
showBrightnessPermissionDialog(context);
}
对话框：-
private static void showBrightnessPermissionDialog(final Context context) {
final AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setCancelable(true);
final AlertDialog alert = builder.create();
builder.setMessage("Please give the permission to change brightness. \n Thanks ")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(android.provider.Settings.ACTION_MANAGE_WRITE_SETTINGS);
intent.setData(Uri.parse("package:" + context.getPackageName()));
// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
alert.dismiss();
}
});
alert.show();
}
例如，完整的亮度代码
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.v7.app.AlertDialog;
public class BrightnessHelper {
public static void setBrightness(Context context, int brightness){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (Settings.System.canWrite(context)) {
//Write code to feature for eg. set brightness or vibrate device
ContentResolver cResolver = context.getContentResolver(); Settings.System.putInt(cResolver, Settings.System.SCREEN_BRIGHTNESS,brightness);
}
else {
showBrightnessPermissionDialog(context);
}
}
}
public static int getBrightness(Context context) {
ContentResolver cResolver = context.getContentResolver();
try {
return Settings.System.getInt(cResolver, Settings.System.SCREEN_BRIGHTNESS);
} catch (Settings.SettingNotFoundException e) {
return 0;
}
}
private static void showBrightnessPermissionDialog(final Context context) {
final AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setCancelable(true);
final AlertDialog alert = builder.create();
builder.setMessage("Please give the permission to change brightness. \n Thanks ")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(android.provider.Settings.ACTION_MANAGE_WRITE_SETTINGS);
intent.setData(Uri.parse("package:" + context.getPackageName()));
// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
alert.dismiss();
}
});
alert.show();
}
/*
private boolean checkSystemWritePermission(Activity activity) {
boolean retVal = true;
if (Build.VERSION.SDK_INT >= activity.Build.VERSION_CODES.M) {
retVal = Settings.System.canWrite(activity.getApplicationContext());
// Log.d(TAG, "Can Write Settings: " + retVal);
if(retVal){
Toast.makeText(activity, "Write allowed :-)", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this, "Write not allowed :-(", Toast.LENGTH_LONG).show();
FragmentManager fm = getFragmentManager();
PopupWritePermission dialogFragment = new PopupWritePermission();
dialogFragment.show(fm, getString(R.string.popup_writesettings_title));
}
}
return retVal;
}*/
}
事实证明，如果在清单中声明了CHANGE\u NETWORK\u STATE
，则即使未授予权限，允许WRITE\u设置的切换也将默认为on位置。您甚至不需要声明WRITE\u设置
就可以遇到此错误。按如下方式编写此方法：
public void writePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (!Settings.System.canWrite(getApplicationContext())) {
Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS, Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, 200);
}
}
}
然后在调用对话框之前调用该方法（writePermission）
我希望这有帮助在请求许可之前，您是否检查是否已授予许可。如果已经授予，则无需再次请求授予权限。因为在marshmallow Forward上，用户可以通过在“设置”中手动拒绝权限。如果您需要如何检查权限是否已授予的代码，我们可以提供它。@Pankaj Commonware他已经解释了如果设置。系统。canWrite（）返回false然后启动活动操作\u管理\u写入\u设置然后用户必须允许permissionSystem。canWrite（）返回false，但权限页显示它已被授予@DhawalSodhaParmarI。我正在询问设置错误行为的原因。System.canWrite（）。请参见，如果用户执行了以下操作，则不会向用户显示对话框-1。已经允许你了。2.拒绝你的允许。但是，如果用户是第一次安装此应用程序，则会向用户显示此信息。如果用户拒绝了您的权限，他仍然可以通过转到“设置”中的“应用权限”并选择相关权限来明确授予您权限。所以你可以决定去那里。我还没有探索意图部分，但我认为这是可能的。您是否尝试过：1）adb安装
2）在设置中启用3）首次启动。顺便说一句，你们使用的是哪种设备和版本的Android？嗨，你们有什么结论吗？我现在遇到了同样的问题@Pankaj had，canWrite（）总是返回false，除了“ACTION\u MANAGE\u WRITE\u SETTINGS”屏幕显示开关为ON之外。我找到的唯一解决办法是在开关中单击两次，因此值被重置，而canWrite（）开始返回true，但这对用户管理来说是可怕的。我有类似的结论，在Moto X第二代6.0上，一切都很好，但Galaxy Note 5和Galaxy S6（均为6.0.1）正在再现此问题。三星默认启用写入系统设置，但调用settings.system.canWrite（此）时返回false。仅当再次禁用并启用该设置时，才会返回true。是的，另一个三星的错误。不正确的开关显示似乎是Android错误：谢谢。这应该是正确的答案。有解决办法吗？我还需要在我的应用程序中使用更改网络状态？我可以在运行时请求它，以便开关显示正确的位置吗？所有这些东西对我的下载来说都很糟糕。如果未授予权限，应用程序甚至不会启动：-（@Ton no CHANGE\u NETWORK\u STATE不需要运行时权限。它只需要在清单中声明