二维码的应用,扫描二维码和生成二维码,使用回传值,导入依赖



• 在module的build.gradle中执行compile操作

  compile 'cn.yipianfengye.android:zxing-library:2.2'
  

  • 在demo Application中执行初始化操作

  @Override
      public void onCreate() {
          super.onCreate();
  
          ZXingLibrary.initDisplayOpinion(this);
      }
  

  清单文件中需要添加
  

  android:name=".ErweimaApplication"

  
  

    xml布局中

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical"
      >
  
      <Button
          android:text="进入二维码页面"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:id="@+id/btn"
          />
  
      <Button
          android:text="生成二维码"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:id="@+id/btn2"
          />
  
      <LinearLayout
           android:orientation="vertical"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content">
  
          <EditText
              android:id="@+id/edit"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content" />
      <ImageView
          android:layout_gravity="center"
          android:src="@mipmap/ic_launcher"
           android:id="@+id/image_view"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" />
      </LinearLayout>
  </LinearLayout>
  

  
  

  代码中

  public class MainActivity extends AppCompatActivity {
  
      private Button btn;
      private Button btn2;
      private ImageView imageView;
      private EditText editText;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          editText = (EditText) findViewById(R.id.edit);
          btn = (Button) findViewById(R.id.btn);
          btn2 = (Button) findViewById(R.id.btn2);
          imageView = (ImageView) findViewById(R.id.image_view);
          //--------------------这是扫码
          btn.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  //打开扫描二维码的界面
            Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
                  //使用带有回传值的,请求码是1
                startActivityForResult(intent,1);
  
               }
          });
  
          //这是生成二维码
          btn2.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
  
                  String textContent = editText.getText().toString();
                  if(TextUtils.isEmpty(textContent)){
                      //如果输入内容为空就吐司
                      Toast.makeText(MainActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();
                      return;
                  }
                  editText.setText("");
                  //生成中心带图标的
                  Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
                  Bitmap resultBitmap = CodeUtils.createImage(textContent,400,400,bitmap);
  
                  imageView.setImageBitmap(resultBitmap);
              }
          });
      }
  
  
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
  
          if (requestCode == 1) {
              //处理扫描结果（在界面上显示）
              if (null != data) {
                  Bundle bundle = data.getExtras();
                  if (bundle == null) {
                      return;
                  }
                  if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {
                      String result = bundle.getString(CodeUtils.RESULT_STRING);
                      Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();
                  } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {
                      Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();
                  }
              }
          }
  
      }
  }