android项目获得手机里所有的应用程序

首先要建立一个javabean用来存储应用程序信息，包括名称，包名，图标，存储位置，是不是系统程序

然后用PackageManager来获取

package com.itheima.bean;

import android.graphics.drawable.Drawable;

public class AppInfo {
    private Drawable icon;
    private String name;
    private String pageName;

    /**
     * true是在内部 false在sdcard
     */
    private boolean isRow;
    /**
     * true 是用户程序 false 是系统程序
     */
    private boolean isUser;

    public Drawable getIcon() {
        return icon;
    }

    public void setIcon(Drawable icon) {
        this.icon = icon;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPageName() {
        return pageName;
    }

    public void setPageName(String pageName) {
        this.pageName = pageName;
    }

    public boolean isRow() {
        return isRow;
    }

    public void setRow(boolean isRow) {
        this.isRow = isRow;
    }

    public boolean isUser() {
        return isUser;
    }

    public void setUser(boolean isUser) {
        this.isUser = isUser;
    }

    @Override
    public String toString() {
        return "AppInfo [name=" + name + ", pageName=" + pageName + ", isRow="
                + isRow + ", isUser=" + isUser + "]";
    }

    


}

具体获取的实现

package com.itheima.engine;

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

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

import com.itheima.bean.AppInfo;

public class AppInfoProvider {
    public static List<AppInfo> getAppMessage(Context context) {
        List<AppInfo> list = new ArrayList<AppInfo>();
        PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> installedPackages = packageManager
                .getInstalledPackages(0);
        for (int i = 0; i < installedPackages.size(); i++) {
            AppInfo app = new AppInfo();
            //包名
            app.setPageName(installedPackages.get(i).packageName);
            //程序图标
            app.setIcon(installedPackages.get(i).applicationInfo
                    .loadIcon(packageManager));
            //程序名称
            app.setName(installedPackages.get(i).applicationInfo.loadLabel(
                    packageManager).toString());
            //应用程序的标示
            int flag = installedPackages.get(i).applicationInfo.flags;
            //判断是不是用户程序
            if ((flag & installedPackages.get(i).applicationInfo.FLAG_SYSTEM) == 0) {
                //应用程序
                app.setUser(true);
            } else {
                //系统程序
                app.setUser(false);
            }
            //判断是内部存储还是外部存储
            if ((flag & installedPackages.get(i).applicationInfo.FLAG_EXTERNAL_STORAGE) == 0) {
                //内部
                app.setRow(true);
            } else {
                //外部
                app.setRow(false);
            }
            list.add(app);
        }

        return list;

    }
}