我正在使用zxing IntentIntegrator扫描Android应用中的条形码或QR码。扫描完代码后,我需要确定代码是QR码还是条形码。我使用以下代码:
public void onActivityResult(int request, int result, Intent i) {
IntentResult scan = IntentIntegrator.parseActivityResult(request, result, i);
if (scan != null) {
format.setText(scan.getFormatName());
contents.setText(scan.getContents());
}
}
但scan.getFormatName()
正在返回null
。我做错了吗?
答案 0 :(得分:1)
我无法在Google Play上使用最新的条码扫描器和ZXingTest应用程序重现这一点。例如,当从扫描QR码返回时,formatName
是“QR_CODE”并相应地打印。
我仍然怀疑你以某种方式触发某人正在拦截我们Intent
的其他应用程序。您确定处理此问题的设备上没有其他内容可能无法正确返回吗?
您确定scan
不是null
并且从不设置文字吗?
答案 1 :(得分:0)
请参阅此代码
static final String ACTION_SCAN = "com.google.zxing.client.android.SCAN";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
Button scan=(Button)findViewById(R.id.btn);
scan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
Intent intent = new Intent(ACTION_SCAN);
intent.putExtra("SCAN_MODE", "PRODUCT_MODE");
startActivityForResult(intent, 0);
}
catch (ActivityNotFoundException anfe)
{
Toast.makeText(MainActivity.this,"No scanner found",Toast.LENGTH_SHORT).show();
}
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
String contents = intent.getStringExtra("SCAN_RESULT");
String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
Toast toast = Toast.makeText(this, "Content:" + contents + " Format:" + format, Toast.LENGTH_LONG);
toast.show();
TextView tv=(TextView)findViewById(R.id.tv);
tv.setText("Content:" + contents + " Format:" + format);
}
}
}
在此您更改了QR码和条形码的intent.putExtra。