launcher初步模型

这个比较简陋，只是自己随便练手瞎写的，以后会继续完善

1.将自己的程序加入到系统launcher选项中

在manifest文件中自己的主程序中的intentFilter中加入如下两行代码即可

<category android:name="android.intent.category.HOME" />

 <category android:name="android.intent.category.DEFAULT" />

2.用GridView显示所有安装的程序，并添加点击事件

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <GridView android:layout_width="fill_parent"        android:id="@+id/apps"        android:numColumns="4"        android:layout_height="wrap_content">    </GridView></LinearLayout>

java程序

package com.test.lancher;import java.util.List;import android.app.Activity;import android.appwidget.AppWidgetHost;import android.appwidget.AppWidgetManager;import android.appwidget.AppWidgetProviderInfo;import android.content.ActivityNotFoundException;import android.content.ComponentName;import android.content.Intent;import android.content.pm.ResolveInfo;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.GridView;import android.widget.ImageView;public class LancherActivity extends Activity {GridView mGrid;private List<ResolveInfo> mApps;private OnItemClickListener listener = new OnItemClickListener() {public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stub

//程序信息ResolveInfo info = mApps.get(arg2);//包名String pkg = info.activityInfo.packageName;// 主activity类名String cls = info.activityInfo.name;ComponentName componet = new ComponentName(pkg, cls);Intent i = new Intent();i.setComponent(componet);startActivity(i);}};/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);loadApps();setContentView(R.layout.main);mGrid = (GridView) findViewById(R.id.apps);mGrid.setAdapter(new AppsAdapter());mGrid.setOnItemClickListener(listener);}//获取所有程序的信息private void loadApps() {

Intent mIntent = new Intent(Intent.ACTION_MAIN, null);mIntent.addCategory(Intent.CATEGORY_LAUNCHER);mApps = getPackageManager().queryIntentActivities(mIntent, 0);}public class AppsAdapter extends BaseAdapter {public AppsAdapter() {}public View getView(int position, View convertView, ViewGroup parent) {ImageView i;if (convertView == null) {i = new ImageView(LancherActivity.this);i.setScaleType(ImageView.ScaleType.FIT_CENTER);i.setLayoutParams(new GridView.LayoutParams(50, 50));} else {i = (ImageView) convertView;}ResolveInfo info = mApps.get(position);i.setImageDrawable(info.activityInfo.loadIcon(getPackageManager()));return i;}public final int getCount() {return mApps.size();}public final Object getItem(int position) {return mApps.get(position);}public final long getItemId(int position) {return position;}}}