Android将Widget添加到自己的应用程序

Widget添加方法：长安桌面-弹出Widget列表-选择之即添加到桌面，下面就实现了一个支持添加到自己应用程序的功能，废话不多说，直接上代码

1、通过继承ViewGroup来实现一个能添加Widget的控件

<spanstyle="font-size:18px;">packagecn.winplus.w2h;

importandroid.content.Context;
importandroid.view.MotionEvent;
importandroid.view.View;
importandroid.view.ViewGroup;

publicclassWidgetLayoutextendsViewGroup{

//存放touch的坐标
privateint[]cellInfo=newint[2];
privateOnLongClickListenermClickListener;

publicWidgetLayout(Contextcontext){
super(context);

mClickListener=newOnLongClickListener(){

@Override
publicbooleanonLongClick(Viewarg0){

returnfalse;
}
};

}

publicvoidaddInScreen(Viewchild,intwidth,intheight){
LayoutParamslp=newLayoutParams(width,height);
lp.x=cellInfo[0];
lp.y=cellInfo[1];
child.setOnLongClickListener(mClickListener);
addView(child,lp);
}

@Override
protectedvoidonLayout(booleanarg0,intarg1,intarg2,intarg3,intarg4){
LayoutParamslParams;
for(inti=0;i<getChildCount();i++){
lParams=(LayoutParams)getChildAt(i).getLayoutParams();
getChildAt(i).layout(lParams.x,lParams.y,
lParams.x+lParams.width,lParams.y+lParams.height);
}
}

@Override
protectedvoidonMeasure(intwidthMeasureSpec,intheightMeasureSpec){
super.onMeasure(widthMeasureSpec,heightMeasureSpec);

LayoutParamslParams;
for(inti=0;i<getChildCount();i++){
lParams=(LayoutParams)getChildAt(i).getLayoutParams();
getChildAt(i).measure(
MeasureSpec.makeMeasureSpec(MeasureSpec.EXACTLY,lParams.width),
MeasureSpec.makeMeasureSpec(MeasureSpec.EXACTLY,lParams.height));
}
}

@Override
publicbooleandispatchTouchEvent(MotionEventev){
cellInfo[0]=(int)ev.getX();
cellInfo[1]=(int)ev.getY();
returnsuper.dispatchTouchEvent(ev);
}

privateclassLayoutParamsextendsViewGroup.LayoutParams{

intx;
inty;

publicLayoutParams(intarg0,intarg1){
super(arg0,arg1);
}

}

}</span>

2、实现添加Widget相关的操作

<spanstyle="font-size:18px;">packagecn.winplus.w2h;

importandroid.app.Activity;
importandroid.appwidget.AppWidgetHost;
importandroid.appwidget.AppWidgetManager;
importandroid.appwidget.AppWidgetProviderInfo;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.View;
importandroid.view.View.OnLongClickListener;

publicclassWidget2HomeActivityextendsActivityimplementsOnLongClickListener{


privatestaticfinalStringTAG="Widget2HomeActivity";

privateAppWidgetHostmAppWidgetHost;
privateAppWidgetManagermAppWidgetManager;
privateWidgetLayoutmWidgetLayout;
privateContextcontext;
privatestaticfinalintAPPWIDGET_HOST_ID=0x100;
privatestaticfinalintREQUEST_PICK_APPWIDGET=0;
privatestaticfinalintREQUEST_CREATE_APPWIDGET=1;
privatestaticfinalStringEXTRA_CUSTOM_WIDGET="custom_widget";

@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);

context=getApplicationContext();

mAppWidgetManager=AppWidgetManager.getInstance(context);
mAppWidgetHost=newAppWidgetHost(context,APPWIDGET_HOST_ID);
mAppWidgetHost.startListening();

mWidgetLayout=newWidgetLayout(this);

mWidgetLayout.setOnLongClickListener(this);
setContentView(mWidgetLayout);
}

@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){

super.onActivityResult(requestCode,resultCode,data);

if(resultCode==RESULT_OK){
switch(requestCode){
caseREQUEST_PICK_APPWIDGET:
addAppWidget(data);
break;
caseREQUEST_CREATE_APPWIDGET:
completeAddAppWidget(data);
break;
}
}elseif(requestCode==REQUEST_PICK_APPWIDGET
&&resultCode==RESULT_CANCELED&&data!=null){
intappWidgetId=data.getIntExtra(
AppWidgetManager.EXTRA_APPWIDGET_ID,-1);
if(appWidgetId!=-1){
mAppWidgetHost.deleteAppWidgetId(appWidgetId);
}
}
}

privatevoidaddAppWidget(Intentdata){
intappWidgetId=data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);
StringcustomWidget=data.getStringExtra(EXTRA_CUSTOM_WIDGET);
if("search_widget".equals(customWidget)){
mAppWidgetHost.deleteAppWidgetId(appWidgetId);
}else{
AppWidgetProviderInfoappWidget=mAppWidgetManager
.getAppWidgetInfo(appWidgetId);

Log.d("addAppWidget","configure:"+appWidget.configure);
if(appWidget.configure!=null){
//弹出配置界面
Intentintent=newIntent(
AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
intent.setComponent(appWidget.configure);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
appWidgetId);

startActivityForResult(intent,REQUEST_CREATE_APPWIDGET);
}else{
//直接添加到界面
onActivityResult(REQUEST_CREATE_APPWIDGET,Activity.RESULT_OK,
data);
}
}
}



/**
*添加widget
*
*@paramdata
*/
privatevoidcompleteAddAppWidget(Intentdata){
Bundleextras=data.getExtras();
intappWidgetId=extras
.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);

AppWidgetProviderInfoappWidgetInfo=mAppWidgetManager
.getAppWidgetInfo(appWidgetId);

ViewhostView=mAppWidgetHost.createView(this,appWidgetId,
appWidgetInfo);

mWidgetLayout.addInScreen(hostView,appWidgetInfo.minWidth,
appWidgetInfo.minHeight);
}

@Override
protectedvoidonDestroy(){
try{
mAppWidgetHost.stopListening();
}catch(NullPointerExceptionex){
Log.i(TAG,"problemwhilestoppingAppWidgetHostduringLauncherdestruction",ex);
}
super.onDestroy();
}

@Override
publicbooleanonLongClick(Viewv){
IntentpickIntent=newIntent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,mAppWidgetHost.allocateAppWidgetId());
//startthepickactivity
startActivityForResult(pickIntent,REQUEST_PICK_APPWIDGET);
returnfalse;
}
}</span>

请看效果图：

转载请注明出处：http://blog.csdn.net/tangcheng_ok/article/details/6857975