Android Studio - 当“if”被满足时如何触发意图

Question

我设法让一个由谷歌视觉提供支持的二维码扫描仪工作，并将二维码放入同一活动的文本视图中。

最终目标是在检测到 qrcode 后立即在另一个活动 (QRWebActivity) 的 web 视图中打开 qrcode 中的 url。

在这个阶段，我能够将 qrcode 移动到一个字符串中，然后使用 sendMessage2 在按钮单击时激活的意图推动并在 web 视图中打开。

但我真的很想找到一种方法让它自动打开 QRWebActivity 并将 webview 发送到 'if(qrCodes.size()!=0) 上的 qrCode。

任何帮助都会很棒。

如果我没有使用正确的术语，真的很抱歉，我只是不知道我在做什么，但我真的很想在本周末完成这个应用程序以发布，我已经很接近了。

        barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {

            @Override

            public void release() {

            }

            @Override

            public void receiveDetections(Detector.Detections<Barcode> detections) {

                final SparseArray<Barcode> qrCodes = detections.getDetectedItems();

                if(qrCodes.size()!=0)

                {

                    textView.post(new Runnable() {

                        @Override

                        public void run() {

                            Vibrator vibrator = (Vibrator)getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);

                            vibrator.vibrate(1000);

                            textView.setText(qrCodes.valueAt(0).displayValue);

                        }

                    });

                }

            }

        });

    }

    public void sendMessage2 (View view)

    {

        String qrmessage = textView.getText().toString();

        Intent intent2 = new Intent(view.getContext(),QRWebActivity.class);

        intent2.putExtra("EXTRA_QRMESSAGE",qrmessage);

        startActivity(intent2);

    }

}

如果我可以在 qrCodes !=0 时模拟按下按钮并触发“sendMessage2”，那我会这样做......即使我确信有一种更优雅的方式。

Answer 1

从您的代码中，这是我的解决方案：@Overridepublic void receiveDetections(Detector.Detections<Barcode> detections) {&nbsp; &nbsp; final SparseArray<Barcode> qrCodes = detections.getDetectedItems();&nbsp; &nbsp; if (qrCodes.size() != 0) {&nbsp; &nbsp; &nbsp; &nbsp; textView.post(new Runnable() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void run() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Vibrator vibrator = (Vibrator)getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vibrator.vibrate(1000);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; textView.setText(qrCodes.valueAt(0).displayValue);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; sendMessage2(textView);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; });&nbsp; &nbsp; }}

Answer 2

所有代码都已经存在，只是不要拆分它：&nbsp; &nbsp; &nbsp; &nbsp; public void receiveDetections(Detector.Detections<Barcode> detections) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; final SparseArray<Barcode> qrCodes = detections.getDetectedItems();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(qrCodes.size()!=0)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Intent intent2 = new Intent(view.getContext(),QRWebActivity.class);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; intent2.putExtra("EXTRA_QRMESSAGE",qrCodes.valueAt(0).displayValue);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; startActivity(intent2);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; textView.post(new Runnable() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void run() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Vibrator vibrator = (Vibrator)getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; vibrator.vibrate(1000);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; textView.setText(qrCodes.valueAt(0).displayValue);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; });&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }