打开应用程序权限设置

Question

关于Android M上的粒度权限。

如果用户两次拒绝权限请求,

或者用户标记“不再询问”。

Answer 1

让我们假设在AndroidManifest.xml中有：

<uses-permission android:name="android.permission.WRITE_CALENDAR"/>
<uses-permission android:name="android.permission.WRITE_CONTACTS"/>
<!-- ETC. -->

然后，与下面的示例活动一样，我们可以检查现有的/授予的权限，如果缺少任何权限，则将用户发送到app settings：

package com.example.permissions.myapplication;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_APP_SETTINGS = 168;

    private static final String[] requiredPermissions = new String[]{
            Manifest.permission.WRITE_CALENDAR,
            Manifest.permission.WRITE_CONTACTS
            /* ETC.. */
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /* All version with SDK_INT < 22 grant permissions on install time. */
        if (Build.VERSION.SDK_INT > 22 && !hasPermissions(requiredPermissions)) {
            Toast.makeText(this, "Please grant all permissions", Toast.LENGTH_LONG).show();
            goToSettings();
        }
    }

    private void goToSettings() {
        Intent myAppSettings = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, Uri.parse("package:" + getPackageName()));
        myAppSettings.addCategory(Intent.CATEGORY_DEFAULT);
        myAppSettings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivityForResult(myAppSettings, REQUEST_APP_SETTINGS);
    }

    public boolean hasPermissions(@NonNull String... permissions) {
        for (String permission : permissions)
            if (PackageManager.PERMISSION_GRANTED != checkSelfPermission(permission))
                return false;
        return true;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_APP_SETTINGS) {
            if (hasPermissions(requiredPermissions)) {
                Toast.makeText(this, "All permissions granted!", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Permissions not granted.", Toast.LENGTH_LONG).show();
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}

我刚刚在Nexus6/Androidos6（Marshmallow）上试了一下。