Android6.0权限总结

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/Leonidas_Li/article/details/80390702

/**
 * Created by Leonidas on 2018/5/14.
 * Version: V1.0
 * Description:继承了Activity，实现Android6.0的运行时权限检测，
 * 需要进行运行时权限检测的Activity可以继承这个类。
 * Others: 暂无
 * ReviseHistory(Author、Date、RevisePart)： 暂无
 */

public class CheckPermissionsActivity extends AppCompatActivity {
    /**
     * 需要进行检测的权限数组
     */
    protected String[] needPermissions = {
            Manifest.permission.ACCESS_COARSE_LOCATION,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.READ_PHONE_STATE
    };
    //权限请求码，作为权限请求的标志
    private static final int PERMISSIONS_REQUEST_CODE = 0;

    /**
     * 判断是否需要检测，防止不停的弹框
     */
    private boolean isNeedCheck = true;

    @Override
    protected void onResume() {
        super.onResume();
        if (isSystemVersionLarge23()) {//判断系统版本是否是Android6.0以上
            if (isNeedCheck) {//如果是，则需要检测
                checkPermissions(needPermissions);
            }
        }
    }

    /**
     * 判断系统版本是否是Android6.0以上
     * @return
     */
    protected boolean isSystemVersionLarge23(){
        if (Build.VERSION.SDK_INT >= 23 && getApplicationInfo().targetSdkVersion >= 23)
            return true;
        else
            return false;
    }

    /**
     * 检查权限
     * @param permissions
     */
    private void checkPermissions(String... permissions) {
        try {
            if (isSystemVersionLarge23()) {
                /*需要请求的权限*/
                List<String> needRequestPermissions = findDeniedPermissions(permissions);
                if (null != needRequestPermissions && needRequestPermissions.size() > 0) {
                    requestPermissions(needRequestPermissions.toArray(new String[needRequestPermissions.size()]),PERMISSIONS_REQUEST_CODE);
                }
            }
        } catch (Throwable e) {
        }
    }

    /**
     * 获取权限集中需要申请权限的列表
     * @param Permissions
     * @return
     *
     */
    private List<String> findDeniedPermissions(String[]Permissions) {
        List<String> needRequestPermissionList = new ArrayList<String>();
        if (isSystemVersionLarge23()){
            try {
                for (String perm : Permissions) {
                    if (checkSelfPermission(perm) != PackageManager.PERMISSION_GRANTED
                            ||shouldShowRequestPermissionRationale(perm)) {//判断权限是否被授予
                        needRequestPermissionList.add(perm);
                    }
                }
            } catch (Throwable e) {

            }
        }
        return needRequestPermissionList;
    }

    /**
     * 检测是否所有的权限都已经授权
     * @param grantResults 授权的结果
     * @return
     */
    private boolean verifyPermissions(int[] grantResults) {
        for (int result : grantResults) {
            if (result != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    /**
     *当进行权限申请，
     * 并且用户做出选择后会回调onRequestPermissionsResult这个方法，
     * 在这个方法中做相关处理。
     * @param requestCode 请求码---要与进行权限申请的requestPermissions方法中的请求码相同，作为权限请求的标志
     * @param Permissions 权限
     * @param grantResults 权限的“授权结果”
     */
    @TargetApi(23)
    public void onRequestPermissionsResult(int requestCode, String[] Permissions, int[] grantResults) {
        if (requestCode == PERMISSIONS_REQUEST_CODE) {//权限请求码
            if (!verifyPermissions(grantResults)) {//判断是否所有需要被授权的权限都被授权了
                showMissingPermissionDialog();//有其中一个权限没被授权，显示权限丢失的对话框
                isNeedCheck = false;//不需要再进行检查了
            }
        }
    }

    /**
     * 显示权限丢失的对话框
     */
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(R.string.notifyTitle);
        builder.setMessage("当前应用缺少必要权限,\n会导致部分功能使用异常。\n\n请点击\"设置\"-\"权限\"-打开所需权限。\n\n");

        // 拒绝, 退出应用
        builder.setNegativeButton(R.string.cancel,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });

        builder.setPositiveButton(R.string.setting,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        startAppSettings();//调用系统的App设置功能
                    }
                });

        builder.setCancelable(false);

        builder.show();
    }

    /**
     *  启动应用的设置
     */
    private void startAppSettings() {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:" + getPackageName()));
        startActivity(intent);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK){//当按下键盘的回退按钮则退出Activity
            this.finish();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

}

参考：
1.https://www.jianshu.com/p/e1ab1a179fbb
2.http://www.cnblogs.com/zqlxtt/p/4873831.html
3.https://www.jianshu.com/p/b4a8b3d4f587
4.高德地图Demo源码