扫描生成二维码 添加依赖zxing

添加依赖

    //把zxing包添加到新建的工程    <!-- 相机 -->    <uses-permission android:name="android.permission.CAMERA" />    <!-- 振动 -->    <uses-permission android:name="android.permission.VIBRATE" />    <activity    android:name="com.xys.libzxing.zxing.activity.CaptureActivity">    </activity>

布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent">    <Button        android:id="@+id/btnSan"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="扫描二维码" />    <TextView        android:id="@+id/tv_content"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/btnSan"        android:layout_centerHorizontal="true"        android:layout_marginTop="10dp" />    <EditText        android:id="@+id/et_input"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_below="@+id/tv_content"        android:layout_marginTop="10dp"        android:hint="请输入要生成的二维码文字" />    <Button        android:id="@+id/btn_generate"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_below="@+id/et_input"        android:layout_marginTop="10dp"        android:text="生成二维码" />    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/btn_generate"        android:layout_centerHorizontal="true"        android:layout_marginTop="10dp" /></RelativeLayout>

MainActivity

public class MainActivity extends AppCompatActivity {    private TextView tv_content;    private EditText et_input;    private ImageView img;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv_content = (TextView) findViewById(R.id.tv_content);        et_input = (EditText) findViewById(R.id.et_input);        img = (ImageView) findViewById(R.id.img);        findViewById(R.id.btnSan).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class), 0);            }        });        findViewById(R.id.btn_generate).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                String str = et_input.getText().toString();                if (str.equals("")) {                    Toast.makeText(MainActivity.this, "不能为空", Toast.LENGTH_SHORT).show();                } else {                    // 位图                    try {                        //参数：1.文本 2 3.二维码的宽高 4.二维码中间的那个logo                        Bitmap bitmap = EncodingUtils.createQRCode(str, 500, 500, null);                        // 设置图片                        img.setImageBitmap(bitmap);                    } catch (Exception e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                }            }        });    }    @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");            Log.d("Main", result);            tv_content.setText(result);        }    }}