Android任务管理器的设计实现

项目结构如图，MyToast类是自定义的Toast类，MainActivity是主要Activity类

MainActivity.java:

package com.taskManager.activity;

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

import android.app.Activity; import android.app.ActivityManager; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.pm.ApplicationInfo; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast;

public class MainActivity extends Activity implements Runnable , OnItemClickListener{  //Handler用来识别的标志  private static final int SEARCH_APP = 0;  private static final int DELETE_APP = 1;  GridView gv;  ListView lv;  //加载程序信息的List  private List<PackageInfo> packageInfo;  //存放手机所有程序信息的List  private List<PackageInfo> showPackageInfo;  //存放用户安装程序信息的List  private List<PackageInfo> userPackageInfo;  private ProgressDialog pd;  ImageButton ib_change_view;  ImageButton ib_change_category ;  private boolean allApplication = true;  private boolean isListView = false;  /**   * 程序一个Handler，用来接收进程传过来的信息   * 然后设置ListView和GridView的适配器   */  private Handler mHandler = new Handler()  {   @Override   public void handleMessage(Message msg) {    super.handleMessage(msg);    //接收成功    if(msg.what == SEARCH_APP)    {     showPackageInfo = packageInfo;     lv.setAdapter(new ListViewAdapter(MainActivity.this,showPackageInfo));     gv.setAdapter(new GridViewAdapter(MainActivity.this,showPackageInfo));     pd.dismiss();    }    else if(msg.what == DELETE_APP){    }   }  };     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         //去除标题            requestWindowFeature(Window.FEATURE_NO_TITLE);      //全屏显示      getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);         setContentView(R.layout.main);         findView();         initSettings();     }     /**      * 加载视图      */     private void findView() {      gv = (GridView)this.findViewById(R.id.gv_apps);      lv = (ListView)this.findViewById(R.id.lv_apps);         pd = ProgressDialog.show(this,"温馨提示","加载中,请稍等...",true,false);         ib_change_category = (ImageButton)this.findViewById(R.id.ib_change_category);         ib_change_view = (ImageButton)this.findViewById(R.id.ib_change_view);  }

    /**      * 初始化设置      */  private void initSettings() {     Thread t = new Thread(this);   t.start();   ib_change_category.setOnClickListener(changeAppsCategory);   ib_change_view.setOnClickListener(changeListView);   gv.setOnItemClickListener(this);   lv.setOnItemClickListener(this);  }  //添加GridView ItemClick监听器  private GridView.OnItemClickListener gvItemClickListener = new GridView.OnItemClickListener(){   @Override   public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,     long arg3) {    }  };  //ListView ItemClick监听器  private ListView.OnItemClickListener lvItemClickListener = new ListView.OnItemClickListener(){   @Override   public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,     long arg3) {    }    };  //点击事件  private ImageButton.OnClickListener changeListView = new ImageButton.OnClickListener(){   @Override   public void onClick(View v) {    if(isListView){     MyToast.myToastShow(MainActivity.this, R.drawable.grids, "表格视图", Toast.LENGTH_SHORT);     ib_change_view.setImageResource(R.drawable.grids);     lv.setVisibility(View.GONE);     gv.setVisibility(View.VISIBLE);     isListView = false;    }       else {     MyToast.myToastShow(MainActivity.this, R.drawable.list, "列表视图", Toast.LENGTH_SHORT);     ib_change_view.setImageResource(R.drawable.list);     lv.setVisibility(View.VISIBLE);     gv.setVisibility(View.GONE);     isListView = true;    }   }  };  //点击事件  private ImageButton.OnClickListener changeAppsCategory =  new ImageButton.OnClickListener(){   @Override   public void onClick(View v) {    if(allApplication){     ib_change_category.setImageResource(R.drawable.user);     showPackageInfo = userPackageInfo;     allApplication = false;     MyToast.myToastShow(MainActivity.this, R.drawable.user, "用户的APP", Toast.LENGTH_SHORT);    }    else{     MyToast.myToastShow(MainActivity.this, R.drawable.all, "所有的APP", Toast.LENGTH_SHORT);     ib_change_category.setImageResource(R.drawable.all);     showPackageInfo = packageInfo;     allApplication = true;        }    gv.setAdapter(new GridViewAdapter(MainActivity.this,showPackageInfo));    lv.setAdapter(new ListViewAdapter(MainActivity.this,showPackageInfo));   }    };

 //GridView的适配器类     class GridViewAdapter extends BaseAdapter{

     LayoutInflater inflater;      List<PackageInfo> pkInfo;      public GridViewAdapter(Context context,List<PackageInfo> packageInfos){       inflater = LayoutInflater.from(context);       this.pkInfo = packageInfos;      }   @Override   public int getCount() {    return pkInfo.size();   }

  @Override   public Object getItem(int arg0) {    return pkInfo.get(arg0);   }

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

  @Override   public View getView(int position, View convertView, ViewGroup parent) {    View view = inflater.inflate(R.layout.gv_item, null);    TextView tv = (TextView)view.findViewById(R.id.gv_item_appname);    ImageView iv =(ImageView) view.findViewById(R.id.gv_item_icon);    tv.setText(pkInfo.get(position).applicationInfo.loadLabel(getPackageManager()));    iv.setImageDrawable(pkInfo.get(position).applicationInfo.loadIcon(getPackageManager()));    return view;   }     }

  //ListView的适配器类     class ListViewAdapter extends BaseAdapter{      LayoutInflater inflater;      List<PackageInfo> pkInfo;      public ListViewAdapter(Context context,List<PackageInfo> packageInfos){       inflater = LayoutInflater.from(context);       this.pkInfo = packageInfos;      }   @Override   public int getCount() {    return pkInfo.size();   }   @Override   public Object getItem(int arg0) {    return pkInfo.get(arg0);   }   @Override   public long getItemId(int position) {    return position;   }   @Override   public View getView(int position, View convertView, ViewGroup parent) {    View view = inflater.inflate(R.layout.list_item, null);    TextView tv_appName = (TextView)view.findViewById(R.id.lv_item_appname);    TextView tv_packageName = (TextView)view.findViewById(R.id.lv_item_packageame);    ImageView iv =(ImageView) view.findViewById(R.id.lv_icon);    tv_appName.setText(pkInfo.get(position).applicationInfo.loadLabel(getPackageManager()));    tv_packageName.setText(pkInfo.get(position).packageName);    iv.setImageDrawable(pkInfo.get(position).applicationInfo.loadIcon(getPackageManager()));    return view;   }     }     /**      * 开一个进程，用Handler来传送Message      */     @Override  public void run() {     packageInfo = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES     | PackageManager.GET_ACTIVITIES);   userPackageInfo = new ArrayList<PackageInfo>();   for (int i =0;i<packageInfo.size();i++){    PackageInfo temp = packageInfo.get(i);    ApplicationInfo appInfo = temp.applicationInfo;    boolean flag = false;    //用户安装的程序    if((appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){     flag = true;    }    else if((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) ==0){     flag = true;    }    if(flag){     userPackageInfo.add(temp);    }   }   //进程睡眠3秒   try {    Thread.sleep(3000);   } catch (InterruptedException e) {    e.printStackTrace();   }   mHandler.sendEmptyMessage(SEARCH_APP);   try {    Thread.currentThread();    Thread.sleep(5000);    //用Handler传送Message    mHandler.sendEmptyMessage(DELETE_APP);   } catch (InterruptedException e) {    e.printStackTrace();   }    }     /**      * ItemClick的处理      */  @Override  public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {    final PackageInfo tempPkInfo = showPackageInfo.get(position);   AlertDialog.Builder builder = new AlertDialog.Builder(this);   builder.setTitle("选项");   builder.setItems(R.array.choice, new DialogInterface.OnClickListener(){

   @Override    public void onClick(DialogInterface dialog, int which) {     switch(which){     case 0:      showAppDetail(tempPkInfo);      break;     case 1:      ActivityManager activityManager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);      activityManager.killBackgroundProcesses(tempPkInfo.packageName);      MyToast.myToastShow(getApplicationContext(), R.drawable.manage, "成功关闭进程!", 1000);      break;     }    }    });   builder.setNegativeButton("取消", null);   builder.create();   builder.show();  }  /**   * Activity回传处理   */  @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {   super.onActivityResult(requestCode, resultCode, data);   packageInfo = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES  | PackageManager.GET_ACTIVITIES);   userPackageInfo = new ArrayList<PackageInfo>();   for (int i =0;i<packageInfo.size();i++){    PackageInfo temp = packageInfo.get(i);    ApplicationInfo appInfo = temp.applicationInfo;    boolean flag = false;    //用户安装的程序    if((appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){     flag = true;    }    else if((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) ==0){     flag = true;    }    if(flag){     userPackageInfo.add(temp);    }   }   if(allApplication){    showPackageInfo = packageInfo;   }   else{       showPackageInfo = userPackageInfo;    }   gv.setAdapter(new GridViewAdapter(MainActivity.this,showPackageInfo));   lv.setAdapter(new ListViewAdapter(MainActivity.this,showPackageInfo));  }  

 /**   *显示程序的详细详细   */  private void showAppDetail(PackageInfo packageInfo) {   AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);   builder.setTitle("程序详细详细");   StringBuffer messageDetail = new StringBuffer();   messageDetail.append("程序名称: " + packageInfo.applicationInfo.loadLabel(getPackageManager()));   messageDetail.append("\n包名: " + packageInfo.packageName);   messageDetail.append("\n版本: " + packageInfo.versionName);   builder.setMessage(messageDetail);   builder.setIcon(packageInfo.applicationInfo.loadIcon(getPackageManager()));   builder.setPositiveButton("确定", null);   builder.create().show();  }  /**   * 回退按钮处理   */  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {   // TODO Auto-generated method stub    if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0){              AlertDialog.Builder alertbBuilder=new AlertDialog.Builder(MainActivity.this);              alertbBuilder.setTitle("提示").setMessage("确认退出？").setPositiveButton("确定", new DialogInterface.OnClickListener() {                      @Override                      public void onClick(DialogInterface dialog, int which) {                          MainActivity.this.finish();                      }              }).setNegativeButton("取消", new DialogInterface.OnClickListener() {                      @Override                      public void onClick(DialogInterface dialog, int which) {                              dialog.cancel();                      }              }).create();              //显示提示框              alertbBuilder.show();    }              return super.onKeyDown(keyCode, event);  } }

MyToast.java:

package com.taskManager.activity;

import android.content.Context; import android.graphics.Color; import android.view.Gravity; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; /**  *  *自定义的Toast类  */ public class MyToast {  public static void myToastShow(Context context,int imageResId,String content, int duration){   Toast toast = new Toast (context);   toast.setDuration(duration);   toast.setGravity(Gravity.BOTTOM, 0, 25);   LinearLayout toastLayout = new LinearLayout(context);   toastLayout.setOrientation(LinearLayout.HORIZONTAL);   toastLayout.setGravity(Gravity.CENTER_VERTICAL);   //设置Toast的图标   ImageView imageView  = new ImageView(context);   imageView.setImageResource(imageResId);   toastLayout.addView(imageView);   //设置Toast的Text   TextView tv_content = new TextView(context);   tv_content.setText(content);   tv_content.setBackgroundColor(Color.BLACK);   toastLayout.addView(tv_content);   toast.setView(toastLayout);   toast.show();  } }

main.xml:

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:background = "#313849"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >     <LinearLayout      android:layout_height = "28px"      android:layout_width = "fill_parent"      android:orientation ="horizontal"      android:gravity = "center_vertical"      android:paddingLeft = "5px"      android:background ="@drawable/top_bg"          >     <ImageView      android:layout_width = "18px"      android:layout_height ="18px"      android:src = "@drawable/manage"/>     <TextView      android:layout_width ="wrap_content"      android:layout_height ="wrap_content"      android:textColor = "#000"      android:textSize= "14px"      android:paddingLeft = "10px"      android:paddingTop = "5px"      android:text = "任务管理器 v1.0.0"/>     </LinearLayout>     <GridView android:id="@+id/gv_apps"       android:layout_width = "fill_parent"       android:layout_height = "fill_parent"       android:numColumns = "3"       android:horizontalSpacing = "10px"       android:verticalSpacing = "10px"       android:listSelector = "@drawable/choose_gridview"       android:layout_marginLeft = "5px"       android:layout_marginTop = "28px"       android:layout_marginBottom = "58px"       android:layout_marginRight = "5px"/>  <ListView      android:id="@+id/lv_apps"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      android:listSelector="@drawable/choose_listview"      android:layout_marginTop="28px"      android:layout_marginBottom="58px"      android:layout_marginLeft="5px"      android:layout_marginRight="5px"      android:visibility="gone"     >     </ListView>     <RelativeLayout      android:layout_width = "fill_parent"      android:layout_height ="58px"      android:layout_alignParentBottom = "true"      android:background = "@drawable/bottom_bg"      >   <ImageButton      android:id="@+id/ib_change_view"      android:layout_alignParentLeft="true"      android:layout_marginLeft="5px"      android:layout_marginTop="1px"      android:src="@drawable/list"      android:layout_width="76px"      android:layout_height="54px"/>     <ImageButton      android:id="@+id/ib_change_category"      android:layout_alignParentRight="true"      android:layout_marginRight="5px"      android:layout_marginTop="1px"      android:src="@drawable/all"      android:layout_width="76px"      android:layout_height="54px"/>     </RelativeLayout>

</RelativeLayout>

list_item.xml:

<?xml version="1.0" encoding="utf-8"?>

<!-- 整体是一个LinearLayout， 1、 布局方向为水平布局， 2、 宽fill_parent 3、 高wrap_content 4、 内容的方向垂直居中 5、 ImageView  a) Id为lv_icon  b) 距离父控件的顶部和底部都是5px  c) 宽、高48px 6、 LinearLayout  a) 布局方向为垂直布局  b) 宽wrap_content  c) 高48px  d) 左边预留5px的距离  e) TextView   i. Id为lv_item_appname   ii. 宽fill_parent   iii. 高wrap_content   iv. 单行显示   v. 字体大小16px   vi. 字体样式:加粗   vii. 字体颜色:#fff  f) TextView   i. Id为lv_item_packagenam   ii. 宽fill_parent   iii. 高wrap_content   iv. 单行显示   v. 字体颜色#fff  -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="horizontal" android:layout_width="fill_parent"  android:layout_height="wrap_content" android:gravity="center_vertical">  <ImageView   android:id="@+id/lv_icon"   android:layout_width="48px"   android:layout_height="48px"   android:layout_marginTop="5px"   android:layout_marginBottom="5px"  ></ImageView>  <LinearLayout   android:orientation="vertical"   android:layout_width="wrap_content"   android:layout_height="48px"   android:paddingLeft="5px"   >   <TextView    android:id="@+id/lv_item_appname"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:singleLine="true"    android:textSize="16px"    android:textStyle="bold"    android:textColor="#fff"   ></TextView>   <TextView    android:id="@+id/lv_item_packageame"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:singleLine="true"    android:textColor="#fff"   ></TextView>  </LinearLayout> </LinearLayout>

gv_item.xml:

<?xml version="1.0" encoding="utf-8"?>

 <!--

  a) LinearLayout i. 高：wrap_content ii. 宽：90px iii. 布局方向：垂直 iv.   设置里面的控件的位置为中间 v. ImageView 1. 设置id为gv_item_icon 2. 宽高都为64px vi.   TextView 1. 设置id为gv_item_appname 2. 宽高都为wrap_content 3. 设置为2行 4.   字体大小16px 5. 颜色#FFF  --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical" android:layout_width="90px"  android:layout_height="wrap_content" android:gravity="center">

 <ImageView android:id="@+id/gv_item_icon"   android:layout_width="64px" android:layout_height="64px">  </ImageView>  <TextView android:id="@+id/gv_item_appname"   android:layout_width="wrap_content" android:layout_height="wrap_content"   android:lines="2" android:textSize="16px" android:textColor="#FFF" /> </LinearLayout>

string.xml:

<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">Hello World, AppExplorer!</string>     <string name="app_name">安卓任务管理器</string>     <array name="choice">      <item name="detail">详细信息</item>      <item name="close">关闭进程</item>     </array> </resources>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.taskManager.activity"     android:versionCode="1"     android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />     <uses-permission android:name="android.permission.GET_TASKS" />  <uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />  <uses-permission android:name="android.permission.GET_PACKAGE_SIZE"/>

    <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name" >         <activity             android:label="@string/app_name"             android:name=".MainActivity" >             <intent-filter >                 <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     </application>

</manifest>

图片: