Android 简略的内存管理器

由于公司项目需要，需要增加内存管理的功能，于是写了这个简单例子，实现的功能很简单，就是获取系统中正在运行的所有进程，并获取到每个进程所占的内存大小，以及系统剩余内存大小，并展示出来，然后通过点击每个进程可以选择是否要关闭进程（系统进程无法关闭），右上角的加号可以实现刷新的功能！高手勿喷，请大家不吝赐教！不多说直接上源码，源码在最后！

主Activity主要代码：

package com.zs.memorymanager;import java.util.ArrayList;import java.util.List;import android.app.ActivityManager;import android.app.ActivityManager.RunningAppProcessInfo;import android.app.AlertDialog;import android.app.Service;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.os.Debug.MemoryInfo;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ImageButton;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;public class MemoryManageActivity extends BaseAmsActivity implements android.view.View.OnClickListener{	/**	 * 显示程序列表的listView	 */	private ListView mListView;	/**	 * listView的适配器	 */	private AppMemoryListAdapter appAdapter;	/**	 * 顶栏	 */	private View title;	private ImageButton titleBack, titleRefresh;	private TextView titleName;	/**	 * 底栏	 */	private TextView freeMemory;	private ActivityManager activityManager;	/**	 * 存放每个正在运行的程序的进程的信息	 */	private List<RunningAppProcessInfo> listProcess;	/**	 * 存放每个正在运行的程序的名称	 */	private List<String> listName;	/**	 * 存放每个正在运行的程勋的进程ID	 */	private int[] pIds;	/**	 * 存放每个正在运行的程序的进程的内存占用详情	 */	private MemoryInfo[] pMemoryInfos;	private List<AppMemory> appList;	/**	 * 获取程序信息的帮助类	 */	private TaskInfo taskInfo;	private MemoryHandler mHandler;	private MemoryThread mThread;		@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_memory_manage);		taskInfo = new TaskInfo(this);		mHandler = new MemoryHandler();		mThread = new MemoryThread();		initView();		initListener();		mThread.start();	}	private void initData() {		// TODO Auto-generated method stub		if(activityManager == null){			activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);		}		if(listProcess != null){			listProcess.clear();			listProcess = null;		}		listProcess = activityManager.getRunningAppProcesses();//获取设备中所有运行的进程列表		if(pIds != null){			pIds = null;;		}		pIds = getAllProcessId(listProcess);//更具进程列表获得进程的id数组pIds		if(listName != null){			listName.clear();			listName = null;		}		listName = getAllProcessName(listProcess);		if(pMemoryInfos != null){			pMemoryInfos = null;		}		pMemoryInfos = activityManager.getProcessMemoryInfo(pIds);//根据进程的pIds数组获取进程列表中的各进程的内存信息对象数组pMemoryInfos		if(appList != null){			appList.clear();			appList = null;		}		appList = new ArrayList<AppMemory>();		AppMemory app = null;		for(int i = 0; i < pIds.length; i++){			app = new AppMemory(pIds[i], listName.get(i), listProcess.get(i).processName,					taskInfo.checkAppType(listProcess.get(i).processName), pMemoryInfos[i]);			appList.add(app);		}					}	private void initView(){		title = (View) findViewById(R.id.title_memory);		titleBack = (ImageButton) title.findViewById(R.id.title_left_bt);		titleRefresh = (ImageButton) title.findViewById(R.id.title_right_bt);		titleName = (TextView) title.findViewById(R.id.title_text);		titleName.setText("内存管理");				mListView = (ListView)findViewById(R.id.lv_memory_manager_app);				freeMemory = (TextView)findViewById(R.id.free_memory);			}	private void initListener(){		titleBack.setOnClickListener(this);		titleRefresh.setOnClickListener(this);		mListView.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {				// TODO Auto-generated method stub				final AppMemory appMemory = appList.get(position);				AlertDialog.Builder builder =new AlertDialog.Builder(MemoryManageActivity.this) ;				if(appMemory.isSystemApp()){					builder.setTitle(appMemory.getName() + "是系统程序，彻底关闭可能造成系统不稳定？") ;					builder.setPositiveButton("关闭", new DialogInterface.OnClickListener() {						@Override						public void onClick(DialogInterface dialog, int which) {							// TODO Auto-generated method stub							ActivityManager am = (ActivityManager) MemoryManageActivity.this.getSystemService(Service.ACTIVITY_SERVICE);							am.killBackgroundProcesses(appMemory.getPackageName());							mThread = new MemoryThread();							mThread.start();						}											}).setNegativeButton("取消", new OnClickListener() {												@Override						public void onClick(DialogInterface dialog, int which) {							// TODO Auto-generated method stub							dialog.cancel() ;  // 取消显示对话框						}					});				}else{					builder.setTitle("确定要彻底关闭程序" + appMemory.getName() + " 吗？") ;					builder.setPositiveButton("关闭", new DialogInterface.OnClickListener() {						@Override						public void onClick(DialogInterface dialog, int which) {							// TODO Auto-generated method stub							ActivityManager am = (ActivityManager) MemoryManageActivity.this.getSystemService(Service.ACTIVITY_SERVICE);							am.killBackgroundProcesses(appMemory.getPackageName());							mThread = new MemoryThread();							mThread.start();						}											}).setNegativeButton("取消", new OnClickListener() {												@Override						public void onClick(DialogInterface dialog, int which) {							// TODO Auto-generated method stub							dialog.cancel() ;  // 取消显示对话框						}					});				}				builder.create().show() ;			}		});	}	private void refreshView(){		if(appAdapter == null){			appAdapter = new AppMemoryListAdapter(MemoryManageActivity.this, appList);		}		appAdapter.refreshData(appList);		mListView.setAdapter(appAdapter);		appAdapter.notifyDataSetChanged();				displayBriefMemory();	}		private int[] getAllProcessId(List<RunningAppProcessInfo> processes){		int[] ids = new int[processes.size()];		for(int i = 0; i < processes.size(); i++){			ids[i] = processes.get(i).pid;		}		return ids;	}		/**	 * 获取所有进程的软件名称	 * @author zhangshuo	 * @date 2013-8-19 上午10:13:32	 * @version  	 [email protected] listProcess	 [email protected]	 */	private List<String> getAllProcessName(List<RunningAppProcessInfo> listProcess){		List<String> listName = new ArrayList<String>();		for(int i = 0; i < listProcess.size(); i++){			String name = taskInfo.getAppName(listProcess.get(i).processName) + taskInfo.getAppVersion(listProcess.get(i).processName);			listName.add(name);		}				return listName;	}		/**	 * 获取系统的内存信息	 * @author zhangshuo	 * @date 2013-8-15 上午11:08:35	 * @version	 */	private void displayBriefMemory() { 		activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); 		ActivityManager.MemoryInfo info = new ActivityManager.MemoryInfo(); 		activityManager.getMemoryInfo(info); 		freeMemory.setText(Math.round((info.availMem/1024/1024f) * 100)/100f + "MB");		Log.i("Tag","系统剩余内存:"+(info.availMem >> 10)+"k"); 		Log.i("Tag","系统是否处于低内存运行："+info.lowMemory);		Log.i("Tag","当系统剩余内存低于"+info.threshold+"时就看成低内存运行");		} 		@Override	public boolean onCreateOptionsMenu(Menu menu) {		// Inflate the menu; this adds items to the action bar if it is present.		getMenuInflater().inflate(R.menu.memory_manage, menu);		return true;	}	class MemoryThread extends Thread{		@Override		public void run() {			// TODO Auto-generated method stub			super.run();			initData();			Message msg = mHandler.obtainMessage();			msg.what = 1;			mHandler.sendMessage(msg);		}			}	class MemoryHandler extends Handler{		@Override		public void handleMessage(Message msg) {			// TODO Auto-generated method stub			super.handleMessage(msg);			if(msg.what == 1){				refreshView();			}else{				Toast.makeText(MemoryManageActivity.this, "获取进程信息失败！", Toast.LENGTH_SHORT).show();			}		}			}	@Override	public void onClick(View v) {		// TODO Auto-generated method stub		switch(v.getId()){		case R.id.title_left_bt:{			ActivityManager am = (ActivityManager) MemoryManageActivity.this.getSystemService(Service.ACTIVITY_SERVICE);			for(int i = 0; i < appList.size(); i++){				am.killBackgroundProcesses(appList.get(i).getPackageName());			}			mThread = new MemoryThread();			mThread.start();			break;		}		case R.id.title_right_bt:{			mThread = new MemoryThread();			mThread.start();			break;		}		}	}	}

package com.zs.memorymanager;import android.os.Debug.MemoryInfo;/** * 每个程序的实体对象 [email protected] zhangshuo [email protected] 2013-8-16 下午4:37:54 [email protected] * description: */public class AppMemory {	private int id;	private String name;	private String packageName;	private boolean isSystemApp;	private MemoryInfo memoryInfo;		public AppMemory(int id, String name, String pName, boolean type, MemoryInfo info){		this.id = id;		this.name = name;		this.packageName = pName;		this.isSystemApp = type;		this.memoryInfo = info;	}	public int getId() {		return id;	}	public void setId(int id) {		this.id = id;	}	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public boolean isSystemApp() {		return isSystemApp;	}	public void setSystemApp(boolean isSystemApp) {		this.isSystemApp = isSystemApp;	}	public MemoryInfo getMemoryInfo() {		return memoryInfo;	}	public void setMemoryInfo(MemoryInfo memoryInfo) {		this.memoryInfo = memoryInfo;	}	public String getPackageName() {		return packageName;	}	public void setPackageName(String packageName) {		this.packageName = packageName;	}			}

package com.zs.memorymanager;import java.lang.ref.SoftReference;import java.util.HashMap;import java.util.List;import android.content.Context;import android.graphics.drawable.Drawable;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;/** [email protected] zhangshuo [email protected] 2013-8-16 下午4:35:51 [email protected] * description: */public class AppMemoryListAdapter extends BaseAdapter{	private HashMap<String, SoftReference<Drawable>> imageCache;// 图片对象缓存，key:图片的ID	private Context context;	private List<AppMemory> appList;	private TaskInfo taskInfo;		public AppMemoryListAdapter(Context con, List<AppMemory> apps){		this.context = con;		this.appList = apps;		this.imageCache = new HashMap<String, SoftReference<Drawable>>();		this.taskInfo = new TaskInfo(con);	}		private Drawable getImageDrawable(AppMemory app){		String id = String.valueOf(app.getId());		String pName = app.getPackageName();		Drawable drawable = null;		if(imageCache.containsKey(id)){			SoftReference<Drawable> softRef = imageCache.get(id);			drawable = softRef.get();			if(drawable == null){				imageCache.remove(id);				drawable = taskInfo.getAppIcon(pName);				if(drawable != null){   			        imageCache.put(id, new SoftReference<Drawable>(drawable));   			    }			}		}else{			drawable = taskInfo.getAppIcon(pName);		    if(drawable != null){   		        imageCache.put(id, new SoftReference<Drawable>(drawable));   		    }		}		System.out.println("程序名： " + app.getName() + " 包名： " + pName);		System.out .println("图片： " + drawable);		return drawable;	}		public void refreshData(List<AppMemory> apps){		this.appList = apps;	}		@Override	public int getCount() {		// TODO Auto-generated method stub		return appList.size();	}	@Override	public Object getItem(int position) {		// TODO Auto-generated method stub		return appList.get(position);	}	@Override	public long getItemId(int position) {		// TODO Auto-generated method stub		return position;	}	@Override	public View getView(int position, View convertView, ViewGroup parent) {		// TODO Auto-generated method stub		HolderView holder;		if (null == convertView) {			holder = new HolderView();			convertView = LayoutInflater.from(context).inflate(R.layout.layout_app_memory_item, null);			holder.ivAppIcon = (ImageView) convertView.findViewById(R.id.iv_app_icon);			holder.tvAppName = (TextView) convertView.findViewById(R.id.tv_app_name);			holder.tvAppType = (TextView) convertView.findViewById(R.id.tv_app_type);			holder.tvAppDirty = (TextView) convertView.findViewById(R.id.tv_app_dirty);			convertView.setTag(holder);		} else {			holder = (HolderView) convertView.getTag();		}		AppMemory app = appList.get(position);		holder.ivAppIcon.setImageDrawable(this.getImageDrawable(app));		holder.tvAppName.setText(app.getName());		float privateDirty = 0.0f;		privateDirty = Math.round((app.getMemoryInfo().getTotalPrivateDirty()/1024f) * 100)/100f;		holder.tvAppDirty.setText(privateDirty + "MB");		System.out.println(app.getMemoryInfo().getTotalPrivateDirty());		if(app.isSystemApp()){			holder.tvAppType.setText("系统进程");			holder.tvAppName.setTextColor(context.getResources().getColor(R.color.red));			holder.tvAppType.setTextColor(context.getResources().getColor(R.color.red));			holder.tvAppDirty.setTextColor(context.getResources().getColor(R.color.red));		}else{			holder.tvAppType.setText("用户进程");			holder.tvAppName.setTextColor(context.getResources().getColor(R.color.green));			holder.tvAppType.setTextColor(context.getResources().getColor(R.color.green));			holder.tvAppDirty.setTextColor(context.getResources().getColor(R.color.red));		}		return convertView;	}	class HolderView {		ImageView ivAppIcon;		TextView tvAppName;		TextView tvAppType;		TextView tvAppDirty;	}}

package com.zs.memorymanager;import java.util.List;import android.content.Context;import android.content.Intent;import android.content.pm.ApplicationInfo;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.content.pm.PackageManager.NameNotFoundException;import android.graphics.drawable.Drawable;/** * 获取程序的各种信息的工具类 [email protected] zhangshuo [email protected] 2013-8-16 下午5:39:50 [email protected] * description: */public class TaskInfo {      Context context ;      PackageManager pm ;      public TaskInfo(Context context) {          this.context = context;          pm = context.getPackageManager();      }         /**     * 根据包名判断程序是否是系统程序     * 是系统程序返回true，用户程序返回false     * @author zhangshuo     * @date 2013-8-19 下午3:33:38     * @version       [email protected] packName     [email protected]     */    public boolean checkAppType(String packName){    	boolean flag = true;    	ApplicationInfo info;		try {			info = pm.getApplicationInfo(packName, 0);			if((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){		       	 flag = false;	        }else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) { 	       	 	flag = false;	        }		} catch (NameNotFoundException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}   		return flag;    }        /*      * 根据包名 查询 图标      */      public Drawable getAppIcon(String packname){        try {               ApplicationInfo info = pm.getApplicationInfo(packname, 0);                return info.loadIcon(pm);          } catch (NameNotFoundException e) {              // TODO Auto-generated catch block               e.printStackTrace();              return null;          }      }            public Drawable getAppIcon2(String packName){    	System.out.println("什么情况Start？");    	Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);		mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);		// 通过查询，获得所有ResolveInfo对象.		List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent, 0);		System.out.println("什么情况？");		for (ResolveInfo reInfo : resolveInfos) {			System.out.println("包名对比：reInfo packName:" + reInfo.activityInfo.packageName + " packName: " + packName);			if(reInfo.activityInfo.packageName == packName){				System.out.println("获得图片： " + reInfo.loadIcon(pm));				return reInfo.loadIcon(pm);			}		}		return null;    }        /*      *获取程序的版本号        */      public String getAppVersion(String packname){                      try {                PackageInfo packinfo =    pm.getPackageInfo(packname, 0);              if(null == packinfo.versionName){            	  return "";              }else{            	  return packinfo.versionName;                }            } catch (NameNotFoundException e) {                  e.printStackTrace();                  return "";              }      }              /*      * 获取程序的名字       */      public String getAppName(String packname){            try {                   ApplicationInfo info = pm.getApplicationInfo(packname, 0);                   if(null == info.loadLabel(pm).toString()){                	 return packname;                 }else{                	 return info.loadLabel(pm).toString();                   }            } catch (NameNotFoundException e) {                  // TODO Auto-generated catch block                   e.printStackTrace();                  return packname;              }      }      /*      * 获取程序的权限      */      public String[] getAppPremission(String packname){            try {                PackageInfo packinfo =    pm.getPackageInfo(packname, PackageManager.GET_PERMISSIONS);                //获取到所有的权限                  return packinfo.requestedPermissions;                } catch (NameNotFoundException e) {                  e.printStackTrace();                  return null;              }      }                  /*      * 获取程序的签名       */      public String getAppSignature(String packname){            try {                PackageInfo packinfo =    pm.getPackageInfo(packname, PackageManager.GET_SIGNATURES);                //获取到所有的权限                  return packinfo.signatures[0].toCharsString();                } catch (NameNotFoundException e) {                  e.printStackTrace();                  return null;              }      }  }  

完整Demo源码下载地址：http://download.csdn.net/detail/super_spy/7177513