Android(安卓)Widget 小部件(三) 在Activity中添加Widget

package com.stone.ui;import static android.util.Log.d;import android.app.Activity;import android.appwidget.AppWidgetHost;import android.appwidget.AppWidgetManager;import android.appwidget.AppWidgetProviderInfo;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnLongClickListener;import android.widget.FrameLayout;import android.widget.FrameLayout.LayoutParams;/** * 在activity中，长按，弹出widget选择界面， * 选择的widget有配置就先弹出， * 创建widget的view 将view加载到 activity中 */public class AddWidgetActivity extends Activity {private AppWidgetHost mAppWidgetHost;private AppWidgetManager mAppWidgetManager;private FrameLayout frameLayout;private static final int REQUEST_PICK_APPWIDGET = 1;private static final int REQUEST_CREATE_APPWIDGET = 2;private static final int APPWIDGET_HOST_ID = 0x100;//用于标识private static final String EXTRA_CUSTOM_WIDGET = "custom_widget";    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                mAppWidgetManager = AppWidgetManager.getInstance(getApplicationContext());        mAppWidgetHost = new AppWidgetHost(getApplicationContext(), APPWIDGET_HOST_ID);        //开始监听widget的变化        mAppWidgetHost.startListening();                frameLayout = new FrameLayout(this);        frameLayout.setOnLongClickListener(new OnLongClickListener() {@Overridepublic boolean onLongClick(View v) {showWidgetChooser();return true;}});        setContentView(frameLayout);    }        @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (resultCode == RESULT_OK) {    switch (requestCode) {    case REQUEST_PICK_APPWIDGET:                addAppWidget(data);                break;            case REQUEST_CREATE_APPWIDGET:                completeAddAppWidget(data);                break;    }    } else if (requestCode == REQUEST_PICK_APPWIDGET &&                resultCode == RESULT_CANCELED && data != null) {            // Clean up the appWidgetId if we canceled            int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);            if (appWidgetId != -1) {                mAppWidgetHost.deleteAppWidgetId(appWidgetId);            }        }    }        /**     * 选中了某个widget之后，根据是否有配置来决定直接添加还是弹出配置activity     * @param data     */    private void addAppWidget(Intent data) {        int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);        String customWidget = data.getStringExtra(EXTRA_CUSTOM_WIDGET);        d("addAppWidget", "data:"+ customWidget);        if ("search_widget".equals(customWidget)) {        //这里直接将search_widget删掉了            mAppWidgetHost.deleteAppWidgetId(appWidgetId);        } else {            AppWidgetProviderInfo appWidget = mAppWidgetManager.getAppWidgetInfo(appWidgetId);                        d("addAppWidget", "configure:"+ appWidget.configure);            if (appWidget.configure != null) {            //有配置，弹出配置                Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);                intent.setComponent(appWidget.configure);                intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);                startActivityForResult(intent, REQUEST_CREATE_APPWIDGET);            } else {            //没有配置，直接添加            completeAddAppWidget(data);            }        }    }        /**     * 请求添加一个新的widget:用于选取系统中的widget     */    private void showWidgetChooser() {    int appWidgetId = mAppWidgetHost.allocateAppWidgetId();        Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);        pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);        startActivityForResult(pickIntent, REQUEST_PICK_APPWIDGET);    }            /**     * 添加widget     * @param data     */    private void completeAddAppWidget(Intent data) {        Bundle extras = data.getExtras();        int appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);        d("completeAddAppWidget", "dumping extras content="+extras.toString());        d("completeAddAppWidget", "appWidgetId:"+ appWidgetId);        AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);                View hostView = mAppWidgetHost.createView(this, appWidgetId, appWidgetInfo);        frameLayout.setLayoutParams(new LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, appWidgetInfo.minHeight));        frameLayout.addView(hostView);     }}
参考：
http://chroya.iteye.com/blog/825407
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