Android 6.0 动态权限申请实例

首先，在AndrodManifest.xml文件中写入权限。

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.CAMERA"/>

然后在MainActivity.java文件中对Android6.0以上的系统进行权限申请。

package com.zhaoxin.mypermissionstest;import android.Manifest;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.PackageManager;import android.net.Uri;import android.provider.Settings;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Toast;import java.util.ArrayList;import java.util.List;/** * android6.0以上申请权限 */public class MainActivity extends AppCompatActivity {    // 未授予的权限集合    private List requestPermissions;    // 请求权限时的请求码    private static final int REQUEST_CODE = 1;    // 申请权限相关    private static String[] permissions = new String[]{            Manifest.permission.WRITE_EXTERNAL_STORAGE,            Manifest.permission.READ_EXTERNAL_STORAGE,            Manifest.permission.CAMERA    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        if (checkPermission()) {// 检测权限已全部授予            // 下一步            next();        } else {            // 请求权限            ActivityCompat.requestPermissions(this, requestPermissions.toArray(new String[requestPermissions.size()]), REQUEST_CODE);        }    }    /**     * 检查权限     *     * @return 是否已全部授权     */    private boolean checkPermission() {        // 权限是否授予标志位        boolean isPermissionGranted = true;        requestPermissions = new ArrayList<>();        // 检查权限是否授予        if (ContextCompat.checkSelfPermission(this, permissions[0]) == PackageManager.PERMISSION_DENIED) {            requestPermissions.add(permissions[0]);            isPermissionGranted = false;        }        if (ContextCompat.checkSelfPermission(this, permissions[1]) == PackageManager.PERMISSION_DENIED) {            requestPermissions.add(permissions[1]);            isPermissionGranted = false;        }        if (ContextCompat.checkSelfPermission(this, permissions[2]) == PackageManager.PERMISSION_DENIED) {            requestPermissions.add(permissions[2]);            isPermissionGranted = false;        }        return isPermissionGranted;    }    /**     * 处理请求结果     *     * @param requestCode  请求码     * @param permissions  权限集合     * @param grantResults 授权结果     */    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        switch (requestCode) {            case REQUEST_CODE:                boolean isAllGranted = true;                // 遍历授权结果，一旦检测到未授权，则将isAllGranted置为false,并跳出循环                for (int grantResult : grantResults) {                    if (grantResult != PackageManager.PERMISSION_GRANTED) {                        isAllGranted = false;                        break;                    }                }                if (isAllGranted)                    // 全部授权通过则进入下一步                    next();                else                    // 否则引导用户手动授权                     openAppDetails();                break;            default:                break;        }    }    /**     * 申请权限成功后要做的事     */    private void next() {        Toast.makeText(this, "申请权限成功", Toast.LENGTH_SHORT).show();    }    /**     * 打开应用的详情设置     */    private void openAppDetails() {        AlertDialog.Builder builder = new AlertDialog.Builder(this);        builder.setMessage("该应用需要访问 “相机” 和 “外部存储器”，请到 “应用 -> 权限” 中授予！");        builder.setPositiveButton("去手动授权", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                Intent intent = new Intent();                intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);                intent.addCategory(Intent.CATEGORY_DEFAULT);                intent.setData(Uri.parse("package:" + getPackageName()));                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);                intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);                startActivity(intent);            }        });        builder.setNegativeButton("取消", null);        builder.show();    }}

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