Android Permissions管理之用户拒绝授权

Android Permissions管理之用户拒绝授权，在Marshmallow之前的安卓版本，应用的权限只需要注册一下，应用就会获取到，在Marshmallow之后，为了安全，全新的权限模型出现，每次使用对应权限的时候，都会弹出 是否让应用获取权限的弹框。如果，用户点击是，给应用授权，那么一切都这样美好的进行就行，如果点击否，拒绝应用的授权，那么一切不美丽的事情就这样开始了，除非用户去设置里面设置给应用权限，那样应用才会正常进行，但是，很遗憾，大部分用户都不会设置这样操作的，繁琐，麻烦。那么解决方案就是每次需要的时候给用户弹出是否给应用授权。

代码如下：

package com.stylingandroid.permissions;

import android.Manifest;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

public class MainActivity extends AppCompatActivity {

    private static final int REQUEST_CODE = 0;
    private static final String[] PERMISSIONS = new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.MODIFY_AUDIO_SETTINGS};
    private PermissionsChecker checker;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        checker = new PermissionsChecker(this);
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (checker.lacksPermissions(PERMISSIONS)) {
            startPermissionsActivity();
        }
    }

    private void startPermissionsActivity() {
        PermissionsActivity.startActivityForResult(this, REQUEST_CODE, PERMISSIONS);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE && resultCode == PermissionsActivity.PERMISSIONS_DENIED) {
            finish();
        }
    }
}

package com.stylingandroid.permissions;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;

public class PermissionsActivity extends AppCompatActivity {
    public static final int PERMISSIONS_GRANTED = 0;
    public static final int PERMISSIONS_DENIED = 1;

    private static final String EXTRA_PERMISSIONS = "com.stylingandroid.permissions.EXTRA_PERMISSIONS";
    private PermissionsChecker checker;

    public static void startActivityForResult(Activity activity, int requestCode, String... permissions) {
        Intent intent = new Intent(activity, PermissionsActivity.class);
        intent.putExtra(EXTRA_PERMISSIONS, permissions);
        ActivityCompat.startActivityForResult(activity, intent, requestCode, null);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_permissions);

        checker = new PermissionsChecker(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        String[] permissions = getPermissions();

        if (checker.lacksPermissions(permissions)) {
            requestPermissions(permissions);
        } else {
            allPermissionsGranted();
        }
    }

    private String[] getPermissions() {
        return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
    }

    private void allPermissionsGranted() {
        setResult(PERMISSIONS_GRANTED);
        finish();
    }

    private void requestPermissions(String... permissions) {
        //NO-OP
    }

}

package com.stylingandroid.permissions;

import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.content.ContextCompat;

class PermissionsChecker {
    private final Context context;

    public PermissionsChecker(Context context) {
        this.context = context;
    }

    public boolean lacksPermissions(String... permissions) {
        for (String permission : permissions) {
            if (lacksPermission(permission)) {
                return true;
            }
        }
        return false;
    }

    private boolean lacksPermission(String permission) {
        return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_DENIED;
    }

}

from:https://github.com/StylingAndroid/Permissions