动态获取权限模板

//自定义方法

public static void checkPerssion(Activity activity) {

// Check if we have write permission

int permission = context.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);

    if (permission != PackageManager.PERMISSION_GRANTED) {

// We don't have permission so prompt the user

    activity.requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_EXTERNAL_STORAGE);

                return;

}

}

@Override

  public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)

    {

switch (requestCode) {

        case REQUEST_EXTERNAL_STORAGE:

            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            }

            else {

                // Permission Denied

                Toast.makeText(Welcome.this, "请开启读写权限", Toast.LENGTH_SHORT).show();

            }

            break;

        default:

            super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    }

    }

透明状态栏 

在主题中加一个item

<style name="AppTheme.Main" parent="AppTheme.NoActionBar">

        <item name="android:windowTranslucentStatus">true</item>

    </style>

隐藏标题栏

activity继承AppCompatActivity

oncreat中getSupportActionBar().hide();

设置屏方向

在 BaseActivity 的 onCreate() 方法中添加下面这句话setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); //竖屏

setRequestedOrientation(ActivityInfo.SCREEN_VERTICAL_PORTRAIT); //竖屏  vertical