Android 添加读写外部存储权限

1 静态修改： AndroidManifest中添加SD卡读写的权限

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

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

2 动态修改：java判断并获取权限

private static final int REQUEST_EXTERNAL_STORAGE = 1;

private static String[] PERMISSIONS_STORAGE = {

        "android.permission.READ_EXTERNAL_STORAGE",

        "android.permission.WRITE_EXTERNAL_STORAGE" };

public static void verifyStoragePermissions(Activity activity) {

    try {

        //检测是否有写的权限

        int permission = ActivityCompat.checkSelfPermission(activity,

                "android.permission.WRITE_EXTERNAL_STORAGE");

        if (permission != PackageManager.PERMISSION_GRANTED) {

        // 没有写的权限，去申请写的权限，会弹出对话框

            ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,REQUEST_EXTERNAL_STORAGE);

        }

    } catch (Exception e) {

        e.printStackTrace();

    }

}