本文实例为大家分享了Android扫描和生成二维码的具体代码，供大家参考，具体内容如下
MainActivity.java
代码语言：javascript复制public class MainActivity extends AppCompatActivity {
private ImageView mImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button =findViewById(R.id.btn);
mImageView =findViewById(R.id.img);
button.setOnClickListener(new View.OnClickListener() { //点击按钮扫描二维码
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this,CaptureActivity.class);
startActivityForResult(intent,2);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==200&& resultCode==RESULT_OK){
if (data!=null){
String content = data.getStringExtra(Constant.CODED_CONTENT);
if (TextUtils.isEmpty(content)){
Toast.makeText(MainActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();
return;
}
Bitmap logo = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
try {
Bitmap bitmap = CodeCreator.createQRCode(content, 400, 400, logo);
mImageView.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
Toast.makeText(MainActivity.this,"扫描" content,Toast.LENGTH_SHORT).show();
}
}
}
}activity.main.xml
代码语言：javascript复制<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical"
<Button
android:id="@ id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="扫一扫"/
<ImageView
android:id="@ id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/
</android.support.constraint.ConstraintLayout 需要配置的权限
代码语言：javascript复制<uses-permission android:name="android.permission.INTERNET"/
<uses-permission android:name="android.permission.CAMERA" </uses-permission
<uses-permission android:name="android.permission.VIBRATE" /
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" </uses-permission
<uses-feature android:name="android.hardware.camera" /
<uses-feature android:name="android.hardware.camera.autofocus" /
<uses-permission android:name="android.permission.FLASHLIGHT" / build.gradle
代码语言：javascript复制minSdkVersion 16 //配置16
implementation'com.github.yuzhiqiang1993:zxing:2.2.1' //依赖外部build.gradle
代码语言：javascript复制allprojects {
repositories {
google()
jcenter()
maven { url 'https://jitpack.io' } //加这行代码
}
}以上就是本文的全部内容，希望对大家的学习有所帮助。
