我使用zxing 2.1库生成了二维码图像,但图像非常模糊且不清晰。我可能哪里出错了?

我可以使用Android Cloud备份我的应用程序的数据库吗?这个功能有什么限制?
无论如何,我可以在离线模式下使用Android的Voice to Text功能.
在给定的示例VoiceRecognition.java中,它使用目标RecognizerIntent.ACTION_RECOGNIZE_SPEECH启动和活动.
这是否意味着需要先安装任何其他apk才能使用此功能,或者我是否需要编写自己的应用程序来启动此意图.
我一直在寻找这个,但是很困惑......
这是我用过的代码..
private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
private ListView mList;
/**
* Called with the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Inflate our UI from its XML layout description.
setContentView(R.layout.voice_recognition);
// Get display items for later interaction
Button speakButton = (Button) findViewById(R.id.btn_speak);
mList = (ListView) findViewById(R.id.list);
// Check to see if a recognition activity is present
PackageManager pm = getPackageManager();
List<ResolveInfo> activities = pm.queryIntentActivities(
new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), …Run Code Online (Sandbox Code Playgroud)