android6.0权限

最新推荐文章于 2021-06-02 22:56:29 发布

原创最新推荐文章于 2021-06-02 22:56:29 发布 · 392 阅读

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本文介绍了在Android 6.0中如何管理权限，包括检查和请求相机、读写外部存储等权限。当权限未授予时，程序会显示提示对话框，引导用户进入设置界面进行权限开启。

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//------------------------------
    protected String[] needPermissions = {
            android.Manifest.permission.CAMERA,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.WRITE_EXTERNAL_STORAGE};
    private static final int PERMISSON_REQUESTCODE = 12;

    private void checkPermissions(String... permissions) {
        //获取  待请求的权限
        List<String> needRequesList = new ArrayList<String>();
        for (String perm : permissions) {
            if (ContextCompat.checkSelfPermission(this,
                    perm) != PackageManager.PERMISSION_GRANTED
                    || ActivityCompat.shouldShowRequestPermissionRationale(
                    this, perm)) {
                needRequesList.add(perm);
            }
        }
        if (null != needRequesList
                && needRequesList.size() > 0) {
            //请求  缺少的权限
            ActivityCompat.requestPermissions(this,
                    needRequesList.toArray(
                            new String[needRequesList.size()]),
                    PERMISSON_REQUESTCODE);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String[] permissions, int[] paramArrayOfInt) {
        if (requestCode == PERMISSON_REQUESTCODE) {
            if (!isPermissionsOK(paramArrayOfInt)) {
                showMissingPermissionDialog();
            }
        }
    }

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

    //显示 权限提示信息
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("提示");
        builder.setMessage("当前应用缺少必要权限。\n请点击\"设置\"-\"权限\"-打开所需权限。");

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

        builder.setPositiveButton("设置",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //设置应用权限
                        Intent intent = new Intent(
                                Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        intent.setData(Uri.parse("package:" + getPackageName()));
                        startActivity(intent);
                    }
                });

        builder.setCancelable(false);
        builder.show();
    }