Android 10动态申请读写权限

1、在AndroidManifest.xml中添加权限

1、添加读写权限
  
  

2、在application中添加该句
android:requestLegacyExternalStorage="true"

在application中添加该句（很重要）
android:requestLegacyExternalStorage="true" 

2、代码中动态申请权限

private void requestMyPermissions() {
       
        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {
            //没有授权，编写申请权限代码
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 100);
        } else {
            Log.d(TAG, "requestMyPermissions: 有写SD权限");
        }
        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.READ_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {
            //没有授权，编写申请权限代码
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 100);
        } else {
            Log.d(TAG, "requestMyPermissions: 有读SD权限");
        }
    }