Android 将第三方app改为Launcher

用户程序和系统程序一起展示，页面的首先上部分展示用户第三方程序，从position=0开始，然后从position=用户程序.size+1展示系统程序。同ListView的形式将数据内容一条条展示。需要注意的是中间会添加2个特殊条目，一个是第三方应用的指示的特殊条目，一个是系统应用指示的特殊条目。

activity_app_manager.xml主布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <TextView 
		style="@style/TitleStyle"
    	android:text="软件管理"
        />
    <LinearLayout 
        android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	android:orientation="horizontal"
        >
        <TextView 
            android:id="@+id/tv_rom"
            android:layout_width="wrap_content"
    		android:layout_height="wrap_content"
    		android:text="内存可用"
    		android:textSize="20sp"
    		android:textColor="@color/black"
    		android:layout_weight="1"
            />
		<TextView 
		    android:id="@+id/tv_sd"
            android:layout_width="wrap_content"
    		android:layout_height="wrap_content"
    		android:text="内存可用"
    		android:textSize="20sp"
    		android:textColor="@color/black"
    		android:layout_weight="1"
            />       
    </LinearLayout>
	<include 
	    android:id="@+id/list_view_callsafe"
	    layout="@layout/list_view_callsafe"
	    
	    />
</LinearLayout>

条目单个显示的布局文件item_app_manager.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    

    <ImageView 
        android:id="@+id/iv_icon"
        android:layout_width="50dp"
    	android:layout_height="50dp"
    	android:background="@drawable/ic_launcher"
        />
    <LinearLayout 
        android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    	android:layout_marginLeft="5dp"
    	android:orientation="vertical"
        >
        <TextView 
            android:id="@+id/tv_name"
            android:layout_width="wrap_content"
    		android:layout_height="wrap_content"
    		android:textSize="20sp"
    		android:textColor="@color/black"
    		android:singleLine="true"
    		android:text="手机卫视"
            />
        <TextView 
            android:id="@+id/tv_location"
            android:layout_width="match_parent"
    		android:layout_height="wrap_content"
    		android:textSize="16sp"
    		android:layout_marginTop="2dp"
    		android:singleLine="true"
    		android:text="手机内存"
            />     
    </LinearLayout>
    <RelativeLayout 
        android:layout_width="wrap_content"
   		android:layout_height="wrap_content"
        >
	   	<TextView
	   	    android:id="@+id/tv_apksize" 
	        android:layout_width="wrap_content"
	   		android:layout_height="wrap_content"
	   		android:textSize="16sp"
	   		android:layout_marginTop="10dp"
	   		android:layout_marginRight="10dp"
	   		android:singleLine="true"
	   		android:text="112M"
	   		android:layout_alignParentRight="true"
	            />	        
    </RelativeLayout>

</LinearLayout>

AppInfo.javaapp细节的bean文件

package com.ldw.safe.bean;

import android.graphics.drawable.Drawable;

public class AppInfo {

	//图片的icon，Drawable比bitmap更广泛，后者只针对图，前者可以针对xml
	private Drawable icon;
	private String apkName;
	private long apkSize;//app的大小
	private boolean userApp;//true表示用户app，false表示系统app
	private boolean isRom;//app放置的位置
	private String apkPackageName;//app的包名
	public Drawable getIcon() {
		return icon;
	}
	public void setIcon(Drawable icon) {
		this.icon = icon;
	}
	public String getApkName() {
		return apkName;
	}
	public void setApkName(String apkName) {
		this.apkName = apkName;
	}
	public long getApkSize() {
		return apkSize;
	}
	public void setApkSize(long apkSize) {
		this.apkSize = apkSize;
	}
	public boolean isUserApp() {
		return userApp;
	}
	public void setUserApp(boolean userApp) {
		this.userApp = userApp;
	}
	public boolean isRom() {
		return isRom;
	}
	public void setRom(boolean isRom) {
		this.isRom = isRom;
	}
	public String getApkPackageName() {
		return apkPackageName;
	}
	public void setApkPackageName(String apkPackageName) {
		this.apkPackageName = apkPackageName;
	}
	@Override
	public String toString() {
		return "AppInfo [icon=" + icon + ", apkName=" + apkName + ", apkSize="
				+ apkSize + ", userApp=" + userApp + ", isRom=" + isRom
				+ ", apkPackageName=" + apkPackageName + "]";
	}
	
	
}

AppInfos.java获取所以app信息的逻辑文件

package com.ldw.safe.engine;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;

import com.ldw.safe.bean.AppInfo;

/*
 * apps的基本信息
 */
public class AppInfos {


	//app的信息是多个，返回一个集合
	public static List<AppInfo> getAppInfos(Context context){
		
		ArrayList<AppInfo> packageAppInfos = new ArrayList<AppInfo>();
		
		//获取到包的管理者
		PackageManager packageManager = context.getPackageManager();
		//获取到所有的安装包
		List<PackageInfo> installedPackages= packageManager.getInstalledPackages(0);
		for(PackageInfo installedPackage : installedPackages){
			AppInfo appInfo = new AppInfo();
			
			//获取到应用程序的图标
			Drawable drawable = installedPackage.applicationInfo.loadIcon(packageManager);
			appInfo.setIcon(drawable);
			//获取到应用程序的名字
			String apkName = (String) installedPackage.applicationInfo.loadLabel(packageManager);
			appInfo.setApkName(apkName);
			//获取到应用程序的包名
			String apkPackageName = installedPackage.packageName;
			appInfo.setApkPackageName(apkPackageName);
			//获取到应用程序的路径
			String sourceDir = installedPackage.applicationInfo.sourceDir;
			//获取到应用程序的大小
			File file = new File(sourceDir);
			long apkSize = file.length();
			appInfo.setApkSize(apkSize);
			
			//第三方应用放在/data/app
			//系统应用放在/system/app
			//获取到安装程序的标记
			int flags = installedPackage.applicationInfo.flags;
			//和系统应用进行与运算
			if((flags & ApplicationInfo.FLAG_SYSTEM) != 0){
				//系统应用
				appInfo.setUserApp(false);
			}else{
				//第三方应用
				appInfo.setUserApp(true);
			}
			//判断位置
			if((flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0){
				//sd卡
				appInfo.setRom(false);
			}else{
				//rom手机内存
				appInfo.setRom(true);
			}
			
			packageAppInfos.add(appInfo);
			//System.out.println("==============");
			//System.out.println("名字"+ apkName);
			//System.out.println("包名"+ apkPackageName);
			//System.out.println("大小"+ apkSize);
		}
		return packageAppInfos;
	}
}

AppManagerActivity.java显示第三方和系统应用的app，包括2个特殊条目

 

package com.ldw.safe.Activity;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.text.format.Formatter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

import com.ldw.safe.R;
import com.ldw.safe.bean.AppInfo;
import com.ldw.safe.engine.AppInfos;
import com.lidroid.xutils.ViewUtils;
import com.lidroid.xutils.view.annotation.ViewInject;

/*
 * 软件管理
 */
public class AppManagerActivity extends Activity {
	//不用findViewById的方法填充
	@ViewInject(R.id.list_view_callsafe)
	private ListView list_view_callsafe;
	@ViewInject(R.id.tv_rom)
	private TextView tv_rom;
	@ViewInject(R.id.tv_sd)
	private TextView tv_sd;
	
	private List<AppInfo> appInfos;//所有应用的集合
	private AppManagerAdapter adapter;
	private ArrayList<AppInfo> userAppInfos;//第三方应用的集合
	private ArrayList<AppInfo> systemAppInfos;//系统应用的集合
	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initUi();
        initData();
	}
	
	private class AppManagerAdapter extends BaseAdapter{

		@Override
		public int getCount() {
			//多出2个特殊的条目
			return userAppInfos.size() + systemAppInfos.size() + 2;		}

		@Override
		public Object getItem(int position) {
			//获取到ListView中应该显示的正常的对象
			if(position == 0){
				return null;
			}else if(position == userAppInfos.size() + 1){
				return null;
			}
			AppInfo appInfo;
			if(position < userAppInfos.size() + 1){
				//中间添加了一个条目，需要减掉
				appInfo = userAppInfos.get(position - 1);
			}else{
				//多出了2个特殊条目
				int location = 1 + userAppInfos.size() + 1;
				appInfo = systemAppInfos.get(position - location);
			}
			return appInfo;
		}

		@Override
		public long getItemId(int position) {
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			if(position == 0){
				//第三方应用程序的展示
				TextView textView = new TextView(AppManagerActivity.this);
				textView.setTextColor(Color.WHITE);
				textView.setBackgroundColor(Color.GRAY);
				textView.setText("第三方应用(" + userAppInfos.size() + ")");
				return textView;
			}else if(position == userAppInfos.size() + 1){
				//系统程序的展示
				TextView textView = new TextView(AppManagerActivity.this);
				textView.setTextColor(Color.WHITE);
				textView.setBackgroundColor(Color.GRAY);
				textView.setText("系统应用(" + systemAppInfos.size() + ")");
				return textView;
			}
			
            AppInfo appInfo;

            if (position < userAppInfos.size() + 1) {
                //把多出来的特殊的条目减掉
                appInfo = userAppInfos.get(position - 1);

            } else {

                int location = userAppInfos.size() + 2;

                appInfo = systemAppInfos.get(position - location);
            }
			
			View view = null;
			ViewHoler holder;
			//防止特殊条目的影响，特殊条目的LinearLayout是空的
			if(convertView != null && convertView instanceof LinearLayout){
				view = convertView;
				holder = (ViewHoler) convertView.getTag();
			}else{

				view = View.inflate(AppManagerActivity.this, R.layout.item_app_manager, null);
				holder = new ViewHoler();
				holder.iv_icon = (ImageView) view.findViewById(R.id.iv_icon);
				holder.tv_apksize = (TextView) view.findViewById(R.id.tv_apksize);
				holder.tv_location = (TextView) view.findViewById(R.id.tv_location);
				holder.tv_name = (TextView) view.findViewById(R.id.tv_name);
				view.setTag(holder);				
			}
			//AppInfo appInfo = appInfos.get(position);
			holder.iv_icon.setBackground(appInfo.getIcon());
			holder.tv_apksize.setText(Formatter.formatShortFileSize(AppManagerActivity.this, appInfo.getApkSize()));
			holder.tv_name.setText(appInfo.getApkName());
			if(appInfo.isRom()){
				//手机内存
				holder.tv_location.setText("手机内存");
			}else{
				//sd卡
				holder.tv_location.setText("sd卡内存");
			}
			return view;
		}
		
	}
	
	static class ViewHoler{
		ImageView  iv_icon;
		TextView tv_apksize;
		TextView tv_location;
		TextView tv_name;
	}
	
	private Handler handler = new Handler(){


		@Override
		public void handleMessage(Message msg){
			adapter = new AppManagerAdapter();
			list_view_callsafe.setAdapter(adapter);
		}
	};

	/*
	 * 初始化apk的数据
	 */
	private void initData() {
		//子线程中初始化，防止anr
		new Thread(){

			@Override
			public void run(){
				//获取到安装的所有的应用程序
				appInfos = AppInfos.getAppInfos(AppManagerActivity.this);
				//第三方应用的集合
				userAppInfos = new ArrayList<AppInfo>();
				//系统应用的集合
				systemAppInfos = new ArrayList<AppInfo>();
				
				for(AppInfo appInfo:appInfos){
					if(appInfo.isUserApp()){
						//第三方应用的集合添加数据
						userAppInfos.add(appInfo);
					}else{
						//系统应用集合添加数据
						systemAppInfos.add(appInfo);
					}
				}
				handler.sendEmptyMessage(0);
				
			}
		}.start();
	}

	//初始化界面
	private void initUi() {
		setContentView(R.layout.activity_app_manager);
		//View viewById = findViewById(R.id.list_view_callsafe);
		//不用findViewById的方法填充
		ViewUtils.inject(this);
		//获取到rom内存的剩余空间
		long rom_freeSpace = Environment.getDataDirectory().getFreeSpace();
		//获取到sd卡的剩余空间
		long sd_freeSpace = Environment.getExternalStorageDirectory().getFreeSpace();
		
		System.out.println("内存可用" + rom_freeSpace + "sd卡可用" + sd_freeSpace);
		
		//格式化存储卡的大小
		tv_rom.setText("内存可用" + Formatter.formatFileSize(this, rom_freeSpace));
		tv_sd.setText("sd卡可用" + Formatter.formatFileSize(this, sd_freeSpace));
		
	}
}