Android Studio - 扫描后的新活动

Question

我在相机扫描后启动的 Java Android APP 中有此代码。 扫描后如何将 go 转到新活动？

ActivityResultLauncher<ScanOptions> barLauncher = registerForActivityResult(new ScanContract(), result ->{
        if (result.getContents()!=null){
            AlertDialog.Builder builder = new AlertDialog.Builder(QRScanActivity.this);
            builder.setTitle("Result");
            builder.setMessage(result.getContents());
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    dialogInterface.dismiss();
                }
            }).show();
        }
    });

谢谢

Answer 1

所以你在扫描后观察到一个对话框，所以下面的部分是你扫描事件的callback ：

if (result.getContents()!=null){
    AlertDialog.Builder builder = new AlertDialog.Builder(QRScanActivity.this);
    builder.setTitle("Result");
    builder.setMessage(result.getContents());
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            dialogInterface.dismiss();
        }
    }).show();
}

因此，您需要做的就是将上面的代码替换为触发新 Activity 的代码：

if (result.getContents() != null) {
  Intent intent = new Intent(QRScanActivity.this, NextTargetActivity.class);
  // You can also put the scanned result contents using intent.putExtra()
  startActivity(intent);
}