动态获取权限工具类及其使用

当前手机各种系统权限比较多，很多时候需要动态的获取一些系统权限，添加其中，为此在写很多APP的时候需要在APP首个界面检查添加权限，所以自己封装了一个根据类。

PermissionUtils类

package com.fly.fengtaobao.utils;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.v4.content.ContextCompat;

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

/**
 * <pre>
 *           .----.
 *        _.'__    `.
 *    .--(Q)(OK)---/$\
 *  .' @          /$$$\
 *  :         ,   $$$$$
 *   `-..__.-' _.-\$$$/
 *         `;_:    `"'
 *       .'"""""`.
 *      /,  FLY  ,\
 *     //         \\
 *     `-._______.-'
 *     ___`. | .'___
 *    (______|______)
 * </pre>
 * 包    名 : com.fly.fengtaobao.utils
 * 作    者 : FLY
 * 创建时间 : 2017/8/3
 * <p>
 * 描述: 动态获取权限
 */

public class PermissionUtils {

    public static final int SETTING_REQUEST_CODE = 1111;

    /**
     * 获取请求权限中需要授权的权限
     * @param context
     * @param permissions 一个或多个权限
     * @return
     */
    public static List<String> getDeniedPermissions(Context context,String... permissions){
        List<String> deniedPermissions = new ArrayList<String>();
        for (String permission : permissions) {
            //判断权限是否授予
            if (ContextCompat.checkSelfPermission(context,permission)== PackageManager.PERMISSION_DENIED){
                deniedPermissions.add(permission);
            }
        }
        return deniedPermissions;
    }

    /**
     * 授权权限
     * @param activity
     * @param permission_request_code
     * @param permissions
     * @return
     */
    @TargetApi(Build.VERSION_CODES.M)
    public static boolean isPermissionsGranted(Activity activity,int permission_request_code,String... permissions){
        List<String> deniedPermissions = PermissionUtils.getDeniedPermissions(activity,permissions);
        if (deniedPermissions != null && deniedPermissions.size()>0){
            activity.requestPermissions(
                    deniedPermissions.toArray(new String[deniedPermissions.size()])
                    ,permission_request_code);
            //授权Activity回调
        }else {
            //权限通过
            return true;
        }
        return false;
    }

    /**
     * 验证所有权限是否都已经授权
     * @param grantResults
     * @return
     */
    public static boolean verifyPermissions(int[] grantResults){
        for (int grantResult:grantResults) {
            if (grantResult != PackageManager.PERMISSION_DENIED){
                return false;
            }
        }
        return true;
    }

    /**
     * 显示提示对话框
     * @param context
     */
    public static void showTipsDialog(Activity context){
        LibDialogUtils.showPermissionTipsDialog(context);
    }

    public static void startAppSettings(Activity context){
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:"+context.getPackageName()));
        //得到新打开Activity关闭后返回的数据
        //第二个参数为请求码，可以根据业务需求自己编号
        context.startActivityForResult(intent,SETTING_REQUEST_CODE);
        context.startActivity(intent);
    }


}

LibDialogUtils类

package com.fly.fengtaobao.utils;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;

import com.fly.fengtaobao.R;

/**
  * <pre>
 *           .----.
 *        _.'__    `.
 *    .--(Q)(OK)---/$\
 *  .' @          /$$$\
 *  :         ,   $$$$$
 *   `-..__.-' _.-\$$$/
 *         `;_:    `"'
 *       .'"""""`.
 *      /,  FLY  ,\
 *     //         \\
 *     `-._______.-'
 *     ___`. | .'___
 *    (______|______)
 * </pre>
 * 包    名 : com.fly.fengtaobao.utils
 * 作    者 : FLY
 * 创建时间 : 2017/8/4
 * <p>
 * 描述: Dialog工具类
 */

public class LibDialogUtils {

    public static void showPermissionTipsDialog(final Activity activity){
        new AlertDialog.Builder(activity)
                .setTitle(R.string.LibDialogUtils_showPermissionTipsDialog_title)
                .setMessage(R.string.LibDialogUtils_showPermissionTipsDialog_message)
                .setPositiveButton(R.string.LibDialogUtils_showPermissionTipsDialog_yes, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        PermissionUtils.startAppSettings(activity);
                    }
                }).show();
    }
}

SplashActivity使用地方

package com.fly.fengtaobao.View;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.view.WindowManager;

import com.fly.fengtaobao.R;
import com.fly.fengtaobao.View.base.BaseActivity;
import com.fly.fengtaobao.View.common.config.Config;
import com.fly.fengtaobao.utils.PermissionUtils;

/**
 * <pre>
 *           .----.
 *        _.'__    `.
 *    .--(Q)(OK)---/$\
 *  .' @          /$$$\
 *  :         ,   $$$$$
 *   `-..__.-' _.-\$$$/
 *         `;_:    `"'
 *       .'"""""`.
 *      /,  FLY  ,\
 *     //         \\
 *     `-._______.-'
 *     ___`. | .'___
 *    (______|______)
 * </pre>
 * 创建时间 : 2017/7/26
 * <p>
 * 描述: View --> 闪屏
 * 1.动态权限的获取
 * 2.判断是否可以正常获取到 手机串号
 */

public class SplashActivity extends BaseActivity {

    /**
     * 要动态获取权限时,延时100毫秒,进入下一个页面
     */
    private static final long DELAY_MILLIS_PERMISSION = 100;
    /**
     * 正常情况下,延时1300毫秒,进入下一个页面
     */
    private static final long DELAY_MILLIS = 500;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //取消状态栏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_splash);

        /**
         * 获取权限
         */
        takePermission();
    }


    private void init() {

    }


    private void takePermission() {
        if (PermissionUtils.isPermissionsGranted(this, Config.SPLASH_ACTIVITY_PERMISSION_REQUEST_CODE
                , Config.mPermissionsSplashActivity)) {
            onPermissionsGranted();
        }
    }

    private void onPermissionsGranted() {
        init();
    }

    private void onPermissionsDenied() {
        PermissionUtils.showTipsDialog(this);
    }

    /**
     * 申请权限的回调
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == Config.SPLASH_ACTIVITY_PERMISSION_REQUEST_CODE) {
            if (PermissionUtils.verifyPermissions(grantResults)) {
                onPermissionsGranted();
            } else {
                onPermissionsDenied();
            }
        }
    }

    /**
     * 从设置界面回来之后的回调,重新验证权限是否获取到
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == PermissionUtils.SETTING_REQUEST_CODE) {
            takePermission();
        }
    }
}