java Ask是安卓 6.0的多重权限

Question

我必须显示多个权限，我的程序只显示第一个我不知道为什么，我希望你能帮助我

导入

import static 安卓.Manifest.permission.CHANGE_CONFIGURATION;
import static 安卓.Manifest.permission.MODIFY_AUDIO_SETTINGS;
import static 安卓.Manifest.permission.WRITE_EXTERNAL_STORAGE; 
import static 安卓.Manifest.permission.WRITE_SETTINGS;

MAIN

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    Permis();
}

功能许可证

private void Permis() {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if ((checkSelfPermission(WRITE_EXTERNAL_STORAGE) ==  PackageManager.PERMISSION_GRANTED) &&
            (checkSelfPermission(CHANGE_CONFIGURATION) ==  PackageManager.PERMISSION_GRANTED) &&
            (checkSelfPermission(MODIFY_AUDIO_SETTINGS) ==  PackageManager.PERMISSION_GRANTED) &&
            (checkSelfPermission(WRITE_SETTINGS) ==  PackageManager.PERMISSION_GRANTED)) {

            Toast.makeText(tuneActivity.this, "Permiso concedido  anteriormente", Toast.LENGTH_SHORT).show();
        }

        if ((shouldShowRequestPermissionRationale(WRITE_EXTERNAL_STORAGE))||
            (shouldShowRequestPermissionRationale(CHANGE_CONFIGURATION)) || 
            (shouldShowRequestPermissionRationale(MODIFY_AUDIO_SETTINGS)) || 
            (shouldShowRequestPermissionRationale(WRITE_SETTINGS))) {

            DialogoAlerta();

        } else {
            requestPermissions(new String[]{WRITE_EXTERNAL_STORAGE,  CHANGE_CONFIGURATION, MODIFY_AUDIO_SETTINGS, WRITE_SETTINGS},
                        MY_PERMISSIONS_REQUEST);
        }
    }
}

函数对话框OALERTA

private void DialogoAlerta() {

        AlertDialog.Builder dialogo=new AlertDialog.Builder(tuneActivity.this);
        dialogo.setTitle("Permisos desactivados");
        dialogo.setMessage("Debe aceptar los permisos para poder definir un  tono como ringtone o sonido de notificacion");
        dialogo.setPositiveButton("Aceptar", new  DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialogInterface, int i) {

                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    requestPermissions(new String[]{WRITE_EXTERNAL_STORAGE,  CHANGE_CONFIGURATION, MODIFY_AUDIO_SETTINGS, WRITE_SETTINGS},
                            MY_PERMISSIONS_REQUEST);
                }
            }

        });
    }

onRequestPermissionsResult

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode,permissions,grantResults);
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST: {
                // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0 && grantResults[0] ==
                 PackageManager.PERMISSION_GRANTED && grantResults[1] ==
                 PackageManager.PERMISSION_GRANTED && grantResults[2] ==
                 PackageManager.PERMISSION_GRANTED && grantResults[3] ==
                 PackageManager.PERMISSION_GRANTED ) { 
                    Toast.makeText (tuneActivity.this,"Permiso concedido",Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText (tuneActivity.this,"Permiso no concedido",Toast.LENGTH_SHORT).show();
            }
        return;
    }
}

}

所以。。该程序只是要求获得第一个权限“写入外部存储”，然后显示“Permisso no concedido”，但我不知道为什么，我希望你能解释为什么，谢谢，抱歉我的英语不好

Answer 1

正如@Sagar所说，我唯一需要申请的权限是“写入外部存储”，因为“修改音频设置”对于android来说是“正常的”。但回到我的问题，我发现的一个解决方案是：

“WRITE_EXTERNAL_STORAGE”（写入外部存储）像我一样询问它，为了获得写入设置，我执行以下代码：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        retVal = Settings.System.canWrite(this);
if(retVal){  
            Toast.makeText(this, "All good", Toast.LENGTH_LONG).show();
        }else{
            Intent intent = new Intent(android.provider.Settings.ACTION_MANAGE_WRITE_SETTINGS);
                        startActivity(intent); // we open the part of the system configuration in which the person have to just enable our app ;)
        }

Answer 2

权限请求仅适用于保护级别为dangerous的权限。您可以参考此document来确定保护级别。有关更多详细信息，请参阅此permission overview document

MODIFY_AUDIO_SETTINGS

您没有看到此权限的权限请求，因为此权限的保护级别为normal。此权限将自动授予，无需向用户请求

WRITE_SETTINGS

您看不到权限请求，因为保护级别为signature。基于documentation

Note: If the app targets API level 23 or higher, the app user must explicitly grant this permission to the app through a permission management screen. The app requests the user's approval by sending an intent with action ACTION_MANAGE_WRITE_SETTINGS. The app can check whether it has this authorization by calling Settings.System.canWrite().

您需要激发意图才能请求此权限

CHANGE_CONFIGURATION

此权限要求应用程序由固件签名密钥签名，或安装在系统分区上。因此，您不能通过权限对话框请求此权限。参考此SO

但是，有一种变通方法可以授予此权限，如下所示：

adb -d shell pm grant <your package name> android.permission.CHANGE_CONFIGURATION

但你不能指望你的所有用户都有技术知识来做到这一点