安卓（Android 12） 动态权限申请

本篇将会封装一个工具，解决安卓权限申请的问题

最终效果：

• 授权的情况

agree.gif

对应的日志

image.png

• 不授权的情况

  
  
  refect.gif

对应的日志

image.png

步骤一

在安卓工程目录下 app ---> src ---> main ---> AndroidManifest.xml ,在AndroidManifest.xml下添加需要的权限，如下

image.png

步骤二

封装一个申请权限的工具类Permission,代码里面有注释，就不赘述了

package com.example.espprovisiondemo;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import java.util.ArrayList;
import java.util.List;

public class Permission {
    //需要申请权限的数组
    private String[] permissions = {
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.BLUETOOTH_ADMIN,
            Manifest.permission.BLUETOOTH_CONNECT,
            Manifest.permission.BLUETOOTH,
            Manifest.permission.BLUETOOTH_SCAN,
    };
    //保存真正需要去申请的权限
    private List permissionList = new ArrayList<>();

    public static int RequestCode = 100;

    public void checkPermissions(Activity activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            for (int i = 0; i < permissions.length; i++) {
                if (ContextCompat.checkSelfPermission(activity,permissions[i]) != PackageManager.PERMISSION_GRANTED) {
                    permissionList.add(permissions[i]);
                }
            }
            //有需要去动态申请的权限
            if (permissionList.size() > 0) {
                requestPermission(activity);
            }
        }
    }
    //去申请的权限
    public void requestPermission(Activity activity) {
        ActivityCompat.requestPermissions(activity,permissionList.toArray(new String[permissionList.size()]),RequestCode);
    }

}

步骤三

在activity里面使用工具类

package com.example.espprovisiondemo;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends AppCompatActivity {
//    private Permission permission;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Permission permission = new Permission();
        permission.checkPermissions(this);
    }
    
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == Permission.RequestCode) {
            for (int i = 0; i < grantResults.length; i++) {
                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
                    Log.e("p","拒绝的权限名称：" + permissions[i]);
                    Log.e("p","拒绝的权限结果：" + grantResults[i]);
                    Log.e("p","有权限未授权，可以弹框出来，让客户去手机设置界面授权。。。");
                }else {
                    Log.e("p","授权的权限名称：" + permissions[i]);
                    Log.e("p","授权的权限结果：" + grantResults[i]);
                }
            }
        }
    }
}

结尾

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