Java AppWidgetHost类代码示例

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
/**
 * Creates workspace loader from an XML resource listed in the app restrictions.
 *
 * @return the loader if the restrictions are set and the resource exists; null otherwise.
 */
private AutoInstallsLayout createWorkspaceLoaderFromAppRestriction(AppWidgetHost widgetHost) {
    Context ctx = getContext();
    UserManager um = (UserManager) ctx.getSystemService(Context.USER_SERVICE);
    Bundle bundle = um.getApplicationRestrictions(ctx.getPackageName());
    if (bundle == null) {
        return null;
    }

    String packageName = bundle.getString(RESTRICTION_PACKAGE_NAME);
    if (packageName != null) {
        try {
            Resources targetResources = ctx.getPackageManager()
                    .getResourcesForApplication(packageName);
            return AutoInstallsLayout.get(ctx, packageName, targetResources,
                    widgetHost, mOpenHelper);
        } catch (NameNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }
    return null;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
private boolean setupWidget() {
    LauncherAppWidgetProviderInfo widgetInfo = LauncherAppWidgetProviderInfo
            .fromProviderInfo(this, mRequest.getAppWidgetProviderInfo(this));
    if (widgetInfo.minSpanX > mIdp.numColumns || widgetInfo.minSpanY > mIdp.numRows) {
        // Cannot add widget
        return false;
    }
    mWidgetCell.setPreview(PinItemDragListener.getPreview(mRequest));

    mAppWidgetManager = AppWidgetManagerCompat.getInstance(this);
    mAppWidgetHost = new AppWidgetHost(this, Launcher.APPWIDGET_HOST_ID);

    mPendingWidgetInfo = new PendingAddWidgetInfo(widgetInfo);
    mPendingWidgetInfo.spanX = Math.min(mIdp.numColumns, widgetInfo.spanX);
    mPendingWidgetInfo.spanY = Math.min(mIdp.numRows, widgetInfo.spanY);
    mWidgetOptions = WidgetHostViewLoader.getDefaultOptionsForWidget(this, mPendingWidgetInfo);

    WidgetItem item = new WidgetItem(widgetInfo, getPackageManager(), mIdp);
    mWidgetCell.getWidgetView().setTag(mPendingWidgetInfo);
    mWidgetCell.applyFromCellItem(item, mApp.getWidgetCache());
    mWidgetCell.ensurePreview();
    return true;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback, Resources res,
        int layoutId, String rootTag) {
    mContext = context;
    mAppWidgetHost = appWidgetHost;
    mCallback = callback;

    mPackageManager = context.getPackageManager();
    mValues = new ContentValues();
    mRootTag = rootTag;

    mSourceRes = res;
    mLayoutId = layoutId;

    mIdp = LauncherAppState.getIDP(context);
    mRowCount = mIdp.numRows;
    mColumnCount = mIdp.numColumns;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
/**
 * Overriden in tests.
 */
protected void onEmptyDbCreated() {
    // Database was just created, so wipe any previous widgets
    if (mWidgetHostResetHandler != null) {
        new AppWidgetHost(mContext, Launcher.APPWIDGET_HOST_ID).deleteHost();
        mWidgetHostResetHandler.sendMessage(Message.obtain(
                mWidgetHostResetHandler,
                ChangeListenerWrapper.MSG_APP_WIDGET_HOST_RESET,
                mContext
        ));
    }

    // Set the flag for empty DB
    Utilities.getPrefs(mContext).edit().putBoolean(EMPTY_DATABASE_CREATED, true).commit();

    // When a new DB is created, remove all previously stored managed profile information.
    ManagedProfileHeuristic.processAllUsers(Collections.<UserHandleCompat>emptyList(),
            mContext);
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
public AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback, Resources res,
        int layoutId, String rootTag) {
    mContext = context;
    mAppWidgetHost = appWidgetHost;
    mCallback = callback;

    mPackageManager = context.getPackageManager();
    mValues = new ContentValues();
    mRootTag = rootTag;

    mSourceRes = res;
    mLayoutId = layoutId;

    mIdp = LauncherAppState.getInstance().getInvariantDeviceProfile();
    mRowCount = mIdp.numRows;
    mColumnCount = mIdp.numColumns;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
@Override
public void onReceive(Context context, Intent intent) {
    mAppWidgetManager = AppWidgetManager.getInstance(context);
    mAppWidgetHost = new AppWidgetHost(context, intent.getIntExtra("appWidgetId", -1));
    cellId = intent.getIntExtra("cellId", -1);

    int appWidgetId = mAppWidgetHost.allocateAppWidgetId();
    Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
    pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);

    try {
        startActivityForResult(pickIntent, REQUEST_PICK_APPWIDGET);
    } catch (ActivityNotFoundException e) {
        U.showToast(DashboardActivity.this, R.string.lock_device_not_supported);
        finish();
    }

    shouldFinish = false;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
DatabaseHelper(Context context) {
    super(context, LauncherFiles.LAUNCHER_DB, null, DATABASE_VERSION);
    mContext = context;
    mAppWidgetHost = new AppWidgetHost(context, Launcher.APPWIDGET_HOST_ID);

    // Table creation sometimes fails silently, which leads to a crash loop.
    // This way, we will try to create a table every time after crash, so the device
    // would eventually be able to recover.
    if (!tableExists(TABLE_FAVORITES) || !tableExists(TABLE_WORKSPACE_SCREENS)) {
        Log.e(TAG, "Tables are missing after onCreate has been called. Trying to recreate");
        // This operation is a no-op if the table already exists.
        addFavoritesTable(getWritableDatabase(), true);
        addWorkspacesTable(getWritableDatabase(), true);
    }

    // In the case where neither onCreate nor onUpgrade gets called, we read the maxId from
    // the DB here
    if (mMaxItemId == -1) {
        mMaxItemId = initializeMaxItemId(getWritableDatabase());
    }
    if (mMaxScreenId == -1) {
        mMaxScreenId = initializeMaxScreenId(getWritableDatabase());
    }
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
public AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback, Resources res,
        int layoutId, String rootTag) {
    mContext = context;
    mAppWidgetHost = appWidgetHost;
    mCallback = callback;

    mPackageManager = context.getPackageManager();
    mValues = new ContentValues();
    mRootTag = rootTag;

    mSourceRes = res;
    mLayoutId = layoutId;

    InvariantDeviceProfile idp = LauncherAppState.getInstance().getInvariantDeviceProfile();
    mHotseatAllAppsRank = idp.hotseatAllAppsRank;
    mRowCount = idp.numRows;
    mColumnCount = idp.numColumns;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
public void addProvider(MainActivity m, AppWidgetHost host, AppWidgetManager manager, AppWidgetProviderInfo provider) {
    int id = host.allocateAppWidgetId();
    boolean success;
    success = manager.bindAppWidgetIdIfAllowed(id, provider.provider);

    if (success) {
        AppWidgetHostView hostView = host.createView(getActivity(), id, provider);
        AppWidgetProviderInfo appWidgetInfo = manager.getAppWidgetInfo(id);

        LauncherAppWidgetInfo info = new LauncherAppWidgetInfo(id);
        info.setHostView(hostView);
        info.getHostView().setAppWidget(id, appWidgetInfo);

        ItemInfo launcherInfo = attachWidget(info);
        if (launcherInfo != null) {
            WidgetPersistance.addDesktopAppWidget(screen, launcherInfo);
        }

    } else {
        Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_BIND);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, id);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, provider.provider);
        m.startActivityForResult(intent, MainActivity.REQUEST_BIND_APPWIDGET);
    }

}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
static AutoInstallsLayout get(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback) {
    Pair<String, Resources> customizationApkInfo = Utilities.findSystemApk(
            ACTION_LAUNCHER_CUSTOMIZATION, context.getPackageManager());
    if (customizationApkInfo == null) {
        return null;
    }

    String pkg = customizationApkInfo.first;
    Resources res = customizationApkInfo.second;
    int layoutId = res.getIdentifier(LAYOUT_RES, "xml", pkg);
    if (layoutId == 0) {
        Log.e(TAG, "Layout definition not found in package: " + pkg);
        return null;
    }
    return new AutoInstallsLayout(context, appWidgetHost, callback, res, layoutId,
            TAG_WORKSPACE);
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
public AutoInstallsLayout(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback, Resources res,
        int layoutId, String rootTag) {
    mContext = context;
    mAppWidgetHost = appWidgetHost;
    mCallback = callback;

    mPackageManager = context.getPackageManager();
    mValues = new ContentValues();
    mRootTag = rootTag;

    mSourceRes = res;
    mLayoutId = layoutId;
    mHotseatAllAppsRank = LauncherAppState.getInstance()
            .getDynamicGrid().getDeviceProfile().hotseatAllAppsRank;
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
@Override
public void startConfigActivity(AppWidgetProviderInfo info, int widgetId, Activity activity,
        AppWidgetHost host, int requestCode) {
    try {
        host.startAppWidgetConfigureActivityForResult(activity, widgetId, 0, requestCode, null);
    } catch (ActivityNotFoundException | SecurityException e) {
        Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
    }
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
static AutoInstallsLayout get(Context context, AppWidgetHost appWidgetHost,
        LayoutParserCallback callback) {
    Pair<String, Resources> customizationApkInfo = Utilities.findSystemApk(
            ACTION_LAUNCHER_CUSTOMIZATION, context.getPackageManager());
    if (customizationApkInfo == null) {
        return null;
    }
    return get(context, customizationApkInfo.first, customizationApkInfo.second,
            appWidgetHost, callback);
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
@Override
public void startConfigActivity(AppWidgetProviderInfo info, int widgetId, Activity activity,
        AppWidgetHost host, int requestCode) {
    Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
    intent.setComponent(info.configure);
    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
    Utilities.startActivityForResultSafely(activity, intent, requestCode);
}
 

import android.appwidget.AppWidgetHost; //导入依赖的package包/类
/**
 * Creates workspace loader from an XML resource listed in the app restrictions.
 *
 * @return the loader if the restrictions are set and the resource exists; null otherwise.
 */
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private AutoInstallsLayout createWorkspaceLoaderFromAppRestriction(AppWidgetHost widgetHost) {
    // UserManager.getApplicationRestrictions() requires minSdkVersion >= 18
    if (!Utilities.ATLEAST_JB_MR2) {
        return null;
    }

    Context ctx = getContext();
    UserManager um = (UserManager) ctx.getSystemService(Context.USER_SERVICE);
    Bundle bundle = um.getApplicationRestrictions(ctx.getPackageName());
    if (bundle == null) {
        return null;
    }

    String packageName = bundle.getString(RESTRICTION_PACKAGE_NAME);
    if (packageName != null) {
        try {
            Resources targetResources = ctx.getPackageManager()
                    .getResourcesForApplication(packageName);
            return AutoInstallsLayout.get(ctx, packageName, targetResources,
                    widgetHost, mOpenHelper);
        } catch (NameNotFoundException e) {
            Log.e(TAG, "Target package for restricted profile not found", e);
            return null;
        }
    }
    return null;
}