WidgetHost Activity to Fragment

Question

我想將WidgetHostActivity轉換爲Fragment，但當我試圖打開WidgetManager時出現錯誤。這裏是轉換到目前爲止，我已經做了（沒有的OnStart和調用OnStop）...

public class FragmentBlue extends Fragment implements OnLongClickListener 
{ 

static final String TAG = "FragmentBlue"; 

public static final int RESULT_OK = -1; 

public static final int RESULT_CANCELED = 0; 

AppWidgetManager mAppWidgetManager; 
AppWidgetHost mAppWidgetHost; 

ViewGroup mainlayout; 
TextView text; 

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

    View view = inflater.inflate(R.layout.fragment_blue, container, false); 

    mainlayout = (ViewGroup) view.findViewById(R.id.main_layout); 
    text = (TextView)view.findViewById(R.id.tvtext); 
    mainlayout.setOnLongClickListener(this); 

    mAppWidgetManager = AppWidgetManager.getInstance(getActivity()); 
    mAppWidgetHost = new AppWidgetHost(getActivity(), R.id.APPWIDGET_HOST_ID); 


    return view; 
} 

/** 
* Launches the menu to select the widget. The selected widget will be on 
* the result of the activity. 
*/ 
void selectWidget() { 
    text.setText(null); 
    int appWidgetId = this.mAppWidgetHost.allocateAppWidgetId(); 
    Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK); 
    pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId); 
    addEmptyData(pickIntent); 
    startActivityForResult(pickIntent, R.id.REQUEST_PICK_APPWIDGET); 
} 

/** 
* This avoids a bug in the com.android.settings.AppWidgetPickActivity, 
* which is used to select widgets. This just adds empty extras to the 
* intent, avoiding the bug. 
* 
* See more: http://code.google.com/p/android/issues/detail?id=4272 
*/ 
void addEmptyData(Intent pickIntent) { 
    ArrayList<AppWidgetProviderInfo> customInfo = new ArrayList<AppWidgetProviderInfo>(); 
    pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_INFO, customInfo); 
    ArrayList<Bundle> customExtras = new ArrayList<Bundle>(); 
    pickIntent.putParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_EXTRAS, customExtras); 
} 

/** 
* If the user has selected an widget, the result will be in the 'data' when 
* this function is called. 
*/ 
@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode == RESULT_OK) { 
     if (requestCode == R.id.REQUEST_PICK_APPWIDGET) { 
      configureWidget(data); 
     } else if (requestCode == R.id.REQUEST_CREATE_APPWIDGET) { 
      createWidget(data); 
     } 
    } else if (resultCode == RESULT_CANCELED && data != null) { 
     int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1); 
     if (appWidgetId != -1) { 
      mAppWidgetHost.deleteAppWidgetId(appWidgetId); 
     } 
    } 
} 

/** 
* Checks if the widget needs any configuration. If it needs, launches the 
* configuration activity. 
*/ 
private void configureWidget(Intent data) { 
    Bundle extras = data.getExtras(); 
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1); 
    AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId); 
    if (appWidgetInfo.configure != null) { 
     Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE); 
     intent.setComponent(appWidgetInfo.configure); 
     intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId); 
     startActivityForResult(intent, R.id.REQUEST_CREATE_APPWIDGET); 
    } else { 
     createWidget(data); 
    } 
} 

/** 
* Creates the widget and adds to our view layout. 
*/ 
public void createWidget(Intent data) { 
    Bundle extras = data.getExtras(); 
    int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1); 
    AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId); 

    AppWidgetHostView hostView = mAppWidgetHost.createView(getActivity(), appWidgetId, appWidgetInfo); 
    hostView.setAppWidget(appWidgetId, appWidgetInfo); 
    mainlayout.addView(hostView); 

    Log.i(TAG, "The widget size is: " + appWidgetInfo.minWidth + "*" + appWidgetInfo.minHeight); 
} 

我認爲這個問題是到startActivityForResult(pickIntent, R.id.REQUEST_PICK_APPWIDGET);因爲當我改變R.id.REQUEST_PICK_APPWIDGET的數字（例如1）WidgetManager打開，當我選擇一個已安裝的小部件它什麼都不做（只是關閉窗口）。 我希望這是可以理解的。

的誤差修改我得到的是：

06-08 16:41:00.896: E/AndroidRuntime(1285): FATAL EXCEPTION: main 
06-08 16:41:00.896: E/AndroidRuntime(1285): Process: pl.looksok.viewpagerdemo, PID: 1285 
06-08 16:41:00.896: E/AndroidRuntime(1285): java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.support.v4.app.FragmentActivity.startActivityFromFragment(FragmentActivity.java:852) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.support.v4.app.Fragment.startActivityForResult(Fragment.java:889) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at pl.looksok.viewpagerdemo.FragmentBlue.selectWidget(FragmentBlue.java:72) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at pl.looksok.viewpagerdemo.FragmentBlue.onLongClick(FragmentBlue.java:214) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.view.View.performLongClick(View.java:4474) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.view.View$CheckForLongPress.run(View.java:18401) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.os.Handler.handleCallback(Handler.java:733) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.os.Handler.dispatchMessage(Handler.java:95) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.os.Looper.loop(Looper.java:136) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at java.lang.reflect.Method.invoke(Method.java:515) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
06-08 16:41:00.896: E/AndroidRuntime(1285):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

所以異常是非常簡單的。比你使用電話時，必須使用更小的數字：

startActivityForResult(pickIntent, R.id.REQUEST_PICK_APPWIDGET); 

創建自己的INT常量和使用它：

public static final int CODE_PICK_APPWIDGET = 1; 
startActivityForResult(pickIntent, CODE_PICK_APPWIDGET);