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前言:该项目主要介绍了二维码扫描、闪光灯开启、本地二维码图片识别、二维码生成。分别是zxing和zbar(网格二维码)分别实现,具体效果运行项目apk...
开发环境:AndroidStudio2.2.1+gradle-2.14.1
涉及知识:
1.Zxing和Zbar(网格)二维码扫描
2.闪光灯开启与关闭
3.本地二维码识别
4.二维码生成
5.Handler机制
6.butterknife注解式开发
引入依赖:
compile 'com.android.support:appcompat-v7:22.+'
compile 'com.google.zxing:core:3.2.1'
compile 'com.jakewharton:butterknife:7.0.1'
compile files('libs/zbar.jar')
部分代码:
/**
* Zbar二维码扫描+闪光灯+本地二维码识别
*/
public class ZbarActivity extends AppCompatActivity implements QRCodeView.Delegate {
@Bind(R.id.zbarview)
ZBarView mQRCodeView;
@Bind(R.id.scancode_lamplight)
ToggleButton toggleButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.zbartest_scan_layout);
ButterKnife.bind(this);
initLayout();
}
private void initLayout() {
mQRCodeView.setDelegate(this);
mQRCodeView.startSpotAndShowRect();//显示扫描框,并且延迟1.5秒后开始识别
toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
mQRCodeView.openFlashlight();
} else {
mQRCodeView.closeFlashlight();
}
}
});
}
@OnClick({R.id.line_back, R.id.scancode_localimg})
protected void onClickBtn(View view) {
switch (view.getId()) {
case R.id.line_back:
finish();
break;
case R.id.scancode_localimg:
Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, 0x11);
break;
default:
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK && requestCode == 0x11) {
Uri uri = data.getData();
String path = null;
if (!TextUtils.isEmpty(uri.getAuthority())) {
Cursor cursor = getContentResolver().query(uri,
new String[]{MediaStore.Images.Media.DATA}, null, null, null);
if (null == cursor) {
Toast.makeText(ZbarActivity.this, "图片没找到", Toast.LENGTH_SHORT).show();
return;
}
cursor.moveToFirst();
path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
cursor.close();
} else {
path = uri.getPath();
}
if (null != path) {
codeDiscriminate(path);
} else {
Toast.makeText(ZbarActivity.this, "图片路径为空", Toast.LENGTH_SHORT).show();
return;
}
}
}
@Override
protected void onRestart() {
mQRCodeView.startCamera();
super.onRestart();
}
@Override
public void onResume() {
super.onResume();
mQRCodeView.startSpotAndShowRect();//显示扫描框,并且延迟1.5秒后开始识别
}
@Override
protected void onStop() {
mQRCodeView.stopCamera();
// mQRCodeView.closeFlashlight();
super.onStop();
}
private void vibrate() {
Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
vibrator.vibrate(200);
}
private void codeDiscriminate(final String path) {
new Thread(new Runnable() {
@Override
public void run() {
Looper.prepare();
String result = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
result = QRCodeDecoder.syncDecodeQRCode(path);
} else {
result = QRCodeDecoder.syncDecodeQRCode2(path);
}
Log.i("zbar_result", Build.VERSION.SDK_INT + "--->" + result);
Message msg = mHandler.obtainMessage();
//封装消息id
msg.what = 1;//作为标示,便于接收消息
msg.obj = result;
mHandler.sendMessage(msg);//发送消息
}
}).start();
}
//创建一个Hander局部类对象,通过handleMessage()钩子方法来更新UI控件
Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
//得到封装消息的id进行匹配
if (1 == msg.what) {
if (null != msg.obj)
onScanQRCodeSuccess(msg.obj.toString());
}
}
};
@Override
protected void onDestroy() {
mQRCodeView.onDestroy();
ButterKnife.unbind(this);
super.onDestroy();
}
@Override
public void onScanQRCodeSuccess(String result) {
Log.i("zbar_result", "result:" + result);
Toast.makeText(this, "二维码的数据:" + result, Toast.LENGTH_SHORT).show();
vibrate();
mQRCodeView.startSpot();
}
@Override
public void onScanQRCodeOpenCameraError() {
Log.e("zbar_result", "打开相机出错");
Toast.makeText(this, "打开相机出错", Toast.LENGTH_SHORT).show();
}
}