MainActivity
package com.example.qrcode_demo06;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.lang.ref.WeakReference;
import cn.bingoogolapple.qrcode.zxing.QRCodeEncoder;
public class MainActivity extends AppCompatActivity {
private ImageView mImageView;
private EditText mEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
mImageView = findViewById(R.id.imageView);
mEditText = findViewById(R.id.editText);
findViewById(R.id.look).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "扫一扫",Toast.LENGTH_SHORT).show();
checkPermission();
}
});
findViewById(R.id.success).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
createQRcode();
}
});
}
//判断权限
private void checkPermission(){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},200);
}else{
startActivity(new Intent(MainActivity.this, ScanActivity.class));
}
}else {
startActivity(new Intent(MainActivity.this, ScanActivity.class));
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 200 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
startActivity(new Intent(MainActivity.this, ScanActivity.class));
}
}
//生成二维码
private void createQRcode() {
QRTask qrTask = new QRTask(this, mImageView, mEditText);
qrTask.execute(mEditText.getText().toString());
}
static class QRTask extends AsyncTask<String, Void, Bitmap>{
private WeakReference<Context> mContext;
private WeakReference<ImageView> mImageView;
public QRTask(Context context, ImageView image, EditText ed) {
mContext = new WeakReference<>(context);
mImageView = new WeakReference<>(image);
}
@Override
protected Bitmap doInBackground(String... params) {
String str = params[0];
if (TextUtils.isEmpty(str)) {
return null;
}
int size = mContext.get().getResources().getDimensionPixelOffset(R.dimen.success_size);
return QRCodeEncoder.syncEncodeQRCode(str, size);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if (bitmap != null) {
mImageView.get().setImageBitmap(bitmap);
} else {
Toast.makeText(mContext.get(), "生成失败", Toast.LENGTH_SHORT).show();
}
}
}
}
ScanActivity
package com.example.qrcode_demo06;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import cn.bingoogolapple.qrcode.core.QRCodeView;
import cn.bingoogolapple.qrcode.zxing.ZXingView;
public class ScanActivity extends AppCompatActivity implements QRCodeView.Delegate {
private ZXingView mZXingView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan);
mZXingView = findViewById(R.id.zxingView);
mZXingView.setDelegate(this);
findViewById(R.id.sao).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mZXingView.changeToScanBarcodeStyle();
}
});
}
@Override
protected void onResume() {
super.onResume();
mZXingView.startCamera();
mZXingView.startSpotAndShowRect();
mZXingView.openFlashlight();
}
@Override
protected void onStop() {
super.onStop();
mZXingView.stopCamera();
}
@Override
protected void onDestroy() {
super.onDestroy();
mZXingView.onDestroy();
}
@Override
public void onScanQRCodeSuccess(String result) {
Log.i("dj", "result is " + result);
}
@Override
public void onCameraAmbientBrightnessChanged(boolean isDark) {
}
@Override
public void onScanQRCodeOpenCameraError() {
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="@+id/look"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="扫描二维码"
android:textSize="20sp"
android:layout_marginTop="10dp"
/>
<EditText
android:id="@+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
/>
<Button
android:id="@+id/success"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="生成二维码"
android:textSize="20sp"
/>
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="30dp"
/>
</LinearLayout>
activity_scan.xml
<?xml version="1.0" encoding="utf-8"?>
<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=".ScanActivity">
<cn.bingoogolapple.qrcode.zxing.ZXingView
android:id="@+id/zxingView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<TextView
android:id="@+id/sao"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="扫一扫"
android:textSize="30sp"
android:textColor="#ffff"
android:gravity="center"
/>
</android.support.constraint.ConstraintLayout>
依赖
implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.3.4'
权限
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>