我使用与 Zxing Intent 相同的方式从我的应用程序中打开扫描仪。但我的应用程序只是打开扫描仪,什么都不做。另外,我收到了一些 FileNotfoundException。
我必须在清单中添加任何权限吗?
这是我使用 Intent 的课程:
public class BarCodes extends Activity {
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button ok;
ok=(Button) findViewById(R.id.b1);
ok.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.setPackage("com.google.zxing.client.android");
intent.putExtra("SCAN_MODE","QR_CODE_MODE");
startActivityForResult(intent, 0);
}
});
System.out.println("SSSSSSSSSSSSS");
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
String contents = intent.getStringExtra("SCAN_RESULT");
System.out.println("contentsssssssssssssssssssssss" + contents);
String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
// Handle successful scan
} else if (resultCode == RESULT_CANCELED) {
// Handle cancel
}
}
}
}
LogCat 也在这里:
java.lang.RunTimeException:Unable to instantiate activity componentInfo{com.pkg.BarCode...}
caused by : java.lang.classNotFoundException:com.pkg.Scan in loader dalvik.System Loader…
可能是什么问题??