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我目前正在研究一個簡單的android自定義啓動器，我在操作部件時遇到了問題。我正在嘗試拖放用戶選擇的窗口小部件。 這裏是我的代碼Android拖放一個小部件
public class FragmentBlue extends Fragment implements OnLongClickListener
{
static final String TAG = "FragmentBlue";
private static final String IMAGEVIEW_TAG = "The Android Logo";
public static final int RESULT_OK = -1;
public static final int CODE_PICK_APPWIDGET = 1;
public static final int RESULT_CANCELED = 0;
Object DragShadowBuilder;
AppWidgetManager mAppWidgetManager;
LauncherAppWidgetHost mAppWidgetHost;
ViewGroup mainlayout;
int numwidgets;
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.home_view);
mainlayout.setOnLongClickListener(this);
mAppWidgetManager = AppWidgetManager.getInstance(getActivity());
mAppWidgetHost = new LauncherAppWidgetHost(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() {
int appWidgetId = this.mAppWidgetHost.allocateAppWidgetId();
Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
addEmptyData(pickIntent);
startActivityForResult(pickIntent, CODE_PICK_APPWIDGET);
}
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 == CODE_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);
LauncherAppWidgetHostView hostView = (LauncherAppWidgetHostView) mAppWidgetHost.createView(getActivity(), appWidgetId, appWidgetInfo);
hostView.setAppWidget(appWidgetId, appWidgetInfo);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(mainlayout.getWidth()/3, mainlayout.getHeight()/3);
lp.leftMargin = numwidgets * (mainlayout.getWidth()/3);
hostView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
view.startDrag(data, shadowBuilder, view, 0);
view.setVisibility(View.INVISIBLE);
return true;
} else {
return false;
}
}
});
hostView.setOnDragListener(new OnDragListener() {
Drawable enterShape = getResources().getDrawable(R.drawable.shape_droptarget);
Drawable normalShape = getResources().getDrawable(R.drawable.shape);
@Override
public boolean onDrag(View v, DragEvent event) {
int action = event.getAction();
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
// do nothing
break;
case DragEvent.ACTION_DRAG_ENTERED:
v.setBackgroundDrawable(enterShape);
break;
case DragEvent.ACTION_DRAG_EXITED:
v.setBackgroundDrawable(normalShape);
break;
case DragEvent.ACTION_DROP:
// Dropped, reassign View to ViewGroup
View view = (View) event.getLocalState();
ViewGroup owner = (ViewGroup) view.getParent();
owner.removeView(view);
GridLayout container = (GridLayout) v;
container.addView(view);
view.setVisibility(View.VISIBLE);
break;
case DragEvent.ACTION_DRAG_ENDED:
v.setBackgroundDrawable(normalShape);
default:
break;
}
return true;
}
});
mainlayout.addView(hostView,lp);
numwidgets ++;
}
我使用XML是這個：
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="300dp"
android:orientation="vertical"
android:stretchMode="columnWidth"
android:id="@+id/home_view"
>
<android.widget.Space
android:id="@+id/space1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</GridLayout>
問題是，當我開始拖動窗口小部件。我可以拖動它，但是當我嘗試刪除它時，它會消失。我想它的原因，我的佈局，但我找不到任何解決方案... 我知道我不完全可以理解，但我是新的Android世界。無論如何謝謝！
你解決了嗎？ –
還沒有，但我暫時離開了這部分機器人。 – Tzeik