android 23版本之上动态申请权限

 

onCreate里面：

 

verifyStoragePermissions();

verifyStoragePermissions：

//在大于23的android版本中,文件读写需要动态申请权限
    private void verifyStoragePermissions() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if ((this.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) ||
                    (this.checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {
                this.requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
            } else {
                Log.d(TAG, "已有权限,不需要再申请");
                mHandler.sendEmptyMessage(MyHandler.PERMISSION_ALLOW);
            }
        } else {
            mHandler.sendEmptyMessage(MyHandler.PERMISSION_ALLOW);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 0x01:  //动态申请的读写权限
                if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                    mHandler.sendEmptyMessage(PERMISSION_ALLOW);
                } else {
                    Toast.makeText(this, "用户没有同意文件读取权限!", Toast.LENGTH_LONG).show();
                }
                break;
            default:
                break;
        }
    }

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