51工具盒子我将于茫茫人海中访我唯一灵魂之伴侣；得之，我幸；不得，我命，如此而已。------徐志摩
安卓请求文件授权
在AndroidManifest.xml中加上
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 | hljs xml <!-- 往SDCard写入数据权限 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- 从SDCard读入数据权限 --> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> |
在启动的activity声明
|---------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 | hljs java //读写权限 public static String[] PERMISSIONS_STORAGE = { Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}; //请求状态码 public static int REQUEST_PERMISSION_CODE = 1; |
在下方onCreate里加上
|-------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 | hljs java if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE); } } |
最后重写onRequestPermissionsResult方法
|---------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 2 3 4 5 6 7 8 9 | hljs java @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == REQUEST_PERMISSION_CODE) { for (int i = 0; i < permissions.length; i++) { Log.i("MainActivity", "申请的权限为：" + permissions[i] + ",申请结果：" + grantResults[i]); } } } |
