android - 将 QR 码扫描器放入 Fragment 中

Question

我正在使用安卓二维码处理库 - android QR code . 我正在扩展扫描仪的 DecoderActivity，现在我希望扫描仪位于 fragment 内，我使用 LocalActivityManager 将 Activity 嵌入 fragment 内。这是代码:

public class QrCodeProcessorFragment extends SherlockFragment {

private static final String KEY_STATE_BUNDLE = "localActivityManagerState";

private LocalActivityManager mLocalActivityManager;

Button generate_qr_code;

private QuickPayManagerActivity parent;

protected LocalActivityManager getLocalActivityManager() {
    return mLocalActivityManager;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Bundle state = null;
    if (savedInstanceState != null) {
        state = savedInstanceState.getBundle(KEY_STATE_BUNDLE);
    }

    mLocalActivityManager = new LocalActivityManager(getActivity(), true);
    mLocalActivityManager.dispatchCreate(state);
}

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // This is where you specify you activity class
    Intent i = new Intent(getSherlockActivity(), CaptureActivity.class);
    Window w = mLocalActivityManager.startActivity("tag", i);
    View currentView = w.getDecorView();
    ViewGroup vg = (ViewGroup) (currentView.getParent());
    if (vg != null)
        vg.removeView(currentView);

    currentView.setVisibility(View.VISIBLE);
    currentView.setFocusableInTouchMode(true);
    ((ViewGroup) currentView)
            .setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);

    return currentView;
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putBundle(KEY_STATE_BUNDLE,
            mLocalActivityManager.saveInstanceState());
}

@Override
public void onResume() {
    System.out.println("lam onresume");
    super.onResume();
    mLocalActivityManager.dispatchResume();
}

@Override
public void onPause() {
    System.out.println("lam onpause");
    super.onPause();
    mLocalActivityManager.dispatchPause(getActivity().isFinishing());
}

@Override
public void onStop() {
    super.onStop();
    mLocalActivityManager.dispatchStop();
}

@Override
public void onDestroy() {
    super.onDestroy();
    mLocalActivityManager.dispatchDestroy(getActivity().isFinishing());
}}

QR 扫描仪现在无法使用。我调试了库代码，它需要一个 Activity 实例，我正在传递 fragment 内的 Activity 实例。希望我清楚这一点。请帮忙!

Answer 1

我找到了一个名为 Barcode Fragment library 的库它使用 fragment 来托管扫描仪功能。工作正常但不支持纵向模式支持，我已经按照 here 中的建议对库进行了更改.它就像一个魅力:)