如何分离活动

Question

我的 Android 应用程序中有多个 onActivityResult 活动，但我同时遇到两个活动运行的问题。当我打开我的 ZXing 条形码扫描器时，它会关闭与我的蓝牙打印机的连接。这是我的代码：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case REQUEST_ENABLE_BT:
                if (resultCode == Activity.RESULT_OK) {
                    Toast.makeText(this, "Bluetooth open successful", Toast.LENGTH_LONG).show();
                } else {
                    finish();
                }
                break;
            case REQUEST_CONNECT_DEVICE:
                if (resultCode == Activity.RESULT_OK) {
                    String address = data.getExtras()
                            .getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
                    con_dev = mService.getDevByMac(address);

                    mService.connect(con_dev);
                }
                break;
        }
            IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
            if (scanningResult != null) {
                String scanContent = scanningResult.getContents();
                String scanFormat = scanningResult.getFormatName();
                //formatTxt.setText("FORMAT: " + scanFormat);
                edtContext.setText(scanContent);
            } else {
                Toast toast = Toast.makeText(getApplicationContext(),
                        "No scan data received!", Toast.LENGTH_SHORT);
                toast.show();
            }
    }

拆分这些活动以使它们不相互重叠的最佳方式是什么？

更新：正如@Mahfa 所说，我需要在扫描 activity 中添加一个请求代码。这是我开始扫描的按钮代码 activity:

btnBarcode = (Button) findViewById(R.id.btnBarcode);
        OnClickListener BarcodeOnClickListener = new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (v.getId() == R.id.btnBarcode) {
                    IntentIntegrator integrator = new IntentIntegrator(PrintDemo.this);
                    integrator.initiateScan();
                }
            }
        };
        btnBarcode.setOnClickListener(BarcodeOnClickListener);

我需要做什么才能向其添加 requestCode？

Answer 1

@Mahfa 通过他发布的链接让我走上正轨，最终我找到了解决我的问题的代码示例 http://www.programcreek.com/java-api-examples/index.php?source_dir=jdkernel-updater-master/src/jdkernel/ui/ThemeListNewActivity.java

这是我完成的代码：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case REQUEST_ENABLE_BT:
                if (resultCode == Activity.RESULT_OK) {
                    Toast.makeText(this, "Bluetooth open successful", Toast.LENGTH_LONG).show();
                } else {
                    finish();
                }
                break;
            case REQUEST_CONNECT_DEVICE:
                if (resultCode == Activity.RESULT_OK) {
                    String address = data.getExtras()
                            .getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
                    con_dev = mService.getDevByMac(address);

                    mService.connect(con_dev);
                }
                break;
            case IntentIntegrator.REQUEST_CODE:
                IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
                if (scanningResult != null) {
                    String scanContent = scanningResult.getContents();
                    String scanFormat = scanningResult.getFormatName();
                    //formatTxt.setText("FORMAT: " + scanFormat);
                    edtContext.setText(scanContent);
                } else {
                    Toast toast = Toast.makeText(getApplicationContext(),
                            "No scan data received!", Toast.LENGTH_SHORT);
                    toast.show();
                }
                break;
        }

我 OnClickListener 上的任何内容都不需要更改。感谢您为我指明正确的方向@Mahfa。

如何分离活动

How to separate activities

java

android

bluetooth

zxing

android-studio