一个util带你解决动态申请权限问题(2018.8重编版)

public class PermissionsUtil {
    // 读写权限
    private static final int REQUEST_EXTERNAL_STORAGE = 1;
    private static String[] PERMISSIONS_STORAGE = {
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.WRITE_EXTERNAL_STORAGE};

    /**
     * 检查应用程序是否有权写入设备存储
     * 如果应用程序没有权限，则会提示用户授予权限
     *
     * @param activity 所在的Activity
     */
    public static void verifyStoragePermissions(Activity activity) {
        // 检查应用程序是否有权写入设备存储
        int permission = ActivityCompat.checkSelfPermission(activity,
                Manifest.permission.WRITE_EXTERNAL_STORAGE);

        if (permission != PackageManager.PERMISSION_GRANTED) {
            // 如果应用程序没有权限，则会提示用户授予权限
            ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,
                    REQUEST_EXTERNAL_STORAGE);
        }
    }
}

verifyStoragePermissions(this);

/**
 * @param requestCode  请求码
 * @param permissions  权限
 * @param grantResults 授予结果
 */
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case 1:
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                LogUtil.i(getResources().getString(R.string.succeed));
            } else {
                Toast.makeText(this, getResources().getString(R.string.failed), Toast.LENGTH_LONG).show();
                finish();
            }
            break;
        default:
    }
}

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