1.导入依赖(build.gradle)
implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.3.4'
2.MainActivity页面
public class MainActivity extends AppCompatActivity {
private EditText editText;
private ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
//获取资源ID
editText = findViewById(R.id.edtext);
imageView = findViewById(R.id.img);
//点击按钮扫描二维码
findViewById(R.id.scan).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkedPermission();
}
});
//点击按钮生成二维码
findViewById(R.id.produce).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
creatQRCode();
}
});
}
//判断版本是否在6.0以上。6.0以上需要动态添加权限
private void checkedPermission() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
//判断有没有权限,没有就授权,否则进行跳转
if(ContextCompat.checkSelfPermission(this,Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.CAMERA},100);
}else{
//进行跳转
startActivity(new Intent(MainActivity.this,LoginActivity.class));
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 100 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
//进行跳转
startActivity(new Intent(MainActivity.this,LoginActivity.class));
}
}
//生成二维码
private void creatQRCode(){
QRTask qrTask = new QRTask(this,imageView,editText);
qrTask.execute(editText.getText().toString());
}
static class QRTask extends AsyncTask<String,Void,Bitmap>{
private WeakReference<Context> mContext;
private WeakReference<ImageView> imageView;
public QRTask(Context context,ImageView mimageView,EditText editText){
mContext = new WeakReference<>(context);
imageView = new WeakReference<>(mimageView);
}
@Override
protected Bitmap doInBackground(String... strings) {
String str = strings[0];
if(TextUtils.isEmpty(str)){
return null;
}
int size = mContext.get().getResources().getDimensionPixelOffset(R.dimen.qr_code_size);
return QRCodeEncoder.syncEncodeQRCode(str,size);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
super.onPostExecute(bitmap);
if (bitmap != null){
imageView.get().setImageBitmap(bitmap);
}else{
Toast.makeText(mContext.get(),"生成失败",Toast.LENGTH_SHORT).show();
}
}
}
}
3.扫描二维码提示吐司的Activity
public class LoginActivity extends AppCompatActivity implements QRCodeView.Delegate {
private ZXingView xingView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//获取资源ID
xingView = findViewById(R.id.zXing);
xingView.setDelegate(this);
}
@Override
protected void onResume() {
super.onResume();
xingView.startCamera();
xingView.startSpotAndShowRect();
/*xingView.openFlashlight();*/
}
@Override
protected void onStop() {
super.onStop();
xingView.stopCamera();
}
@Override
protected void onDestroy() {
super.onDestroy();
xingView.onDestroy();
}
@Override
public void onScanQRCodeSuccess(String result) {
Toast.makeText(this,result.toString(),Toast.LENGTH_SHORT).show();
}
@Override
public void onCameraAmbientBrightnessChanged(boolean isDark) {
//环境改变,是否变暗,变暗isDark为true
}
@Override
public void onScanQRCodeOpenCameraError() {
//打开相机失败
}
}
3.1Xml布局
<?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=".LoginActivity">
<cn.bingoogolapple.qrcode.zxing.ZXingView
android:id="@+id/zXing"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</android.support.constraint.ConstraintLayout>
4.Main Xml布局
<?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/scan"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="扫描二维码"
/>
<EditText
android:id="@+id/edtext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="15"
android:hint="请输入内容"
/>
<Button
android:id="@+id/produce"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="生成二维码"
/>
<ImageView
android:id="@+id/img"
android:layout_width="100dp"
android:layout_height="100dp"
android:gravity="center_horizontal"
android:background="@mipmap/ic_launcher"
/>
</LinearLayout>
在清单文件中配置权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />