点击扫一扫二维码返回文本内容

点击下载导入自己的studio里面并且依赖：https://github.com/young1293/Zxing_libzxing
第一步：

 <uses-permission android:name="android.permission.INTERNET"></uses-permission>    <!-- 相机 -->    <uses-permission android:name="android.permission.CAMERA" />    <!-- 振动 -->    <uses-permission android:name="android.permission.VIBRATE" />

第二步：

 <Button            android:id="@+id/btnSan"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="扫描二维码" />        <TextView            android:id="@+id/text_main"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="23456"/>

第三步：

  </application>    <activity        android:name="com.xys.libzxing.zxing.activity.CaptureActivity"        android:configChanges="orientation|keyboardHidden"        android:screenOrientation="portrait"        android:theme="@android:style/Theme.NoTitleBar.Fullscreen"        android:windowSoftInputMode="stateAlwaysHidden">    </activity>

第四步：

public class MainActivity extends AppCompatActivity{    private TextView tv_content;    private Button but;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv_content = (TextView) findViewById(R.id.text_main);        but = (Button) findViewById(R.id.btnSan);       but.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class), 0);            }        });    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == RESULT_OK) {            String result = data.getExtras().getString("result");            tv_content.setText(result);        }    }}