我的手机管家（15） 缓存处理 逻辑代码

 /**
     *  
     */
    class MyStatsObserver extends IPackageStatsObserver.Stub{
        //在子线程运行
        @Override
        public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
                throws RemoteException {
            //缓存大小
            long cacheSize = pStats.cacheSize;
            //安装包大小
            long codeSize = pStats.codeSize;
            //数据包大小
            long dataSize = pStats.dataSize;
            if(cacheSize > 0 ){
                //获取图标，名称，缓存大小
                String packageName=pStats.packageName;
                try {
                    ApplicationInfo app = pm.getApplicationInfo(packageName, 0);
                    CacheInfo info = new CacheInfo(); 
                    info.name = app.loadLabel(pm).toString();
                    info.icon = app.loadIcon(pm);
                    info.cacheSize = cacheSize;
                    info.packageName = packageName;


                    //通知更新界面
                    Message message = Message.obtain();
                    message.what = 2;//有缓存时发消息
                    message.obj = info;
                    myHandler.sendMessage(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        }

    }

 
    /**
     * 扫描
     */
    public void  doScan() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                //获取已安装的应用程序的信息, packageInfo存储包的整体内容信息
                List<PackageInfo> packages =  
                        pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
                progressBar.setMax(packages.size());
                int progress = 0;
                //遍历每个包信息
                for(PackageInfo info : packages){
                    //应用名称
                    String packageName = info.applicationInfo.loadLabel(pm).toString();

                    try {
                        //通过反射， 获取缓存大小
                        Method method = pm.getClass().
                                getMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
                        //调用方法
                        method.invoke(pm, packageName, new MyStatsObserver());
                        progress++;
                        progressBar.setProgress(progress);

                        //更新进度
                        Message msg = Message.obtain();
                        msg.what = 1;
                        msg.obj = packageName;
                        myHandler.sendMessage(msg);

                        //休眠
                        Thread.sleep(50);

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                Message msg = Message.obtain();
                myHandler.sendEmptyMessage(0);
            }
        }).start();
    }

package com.chb.myphonesave.activity;

import java.lang.reflect.Method;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.IPackageDataObserver;
import android.content.pm.IPackageStatsObserver;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageStats;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.RemoteException;
import android.text.format.Formatter;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.chb.myphonesave.R;
import com.chb.myphonesave.entity.CacheInfo;
/**
 * 缓存清理
 *         1   正在扫描
 *         2 扫描完成
 *         
 */
public class CacheCleanActivity extends Activity {
    boolean isScanOver;//是否是已扫描完成;
    TextView tv_tip;//显示正在扫描应用的名称
    TextView tv1;    //正在扫描
    ProgressBar progressBar;
    LinearLayout cacheLayout;
    private PackageManager pm;//包管理器
    Button btn_control;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_cacheclean);
        initView(); 
    }
    /**
     * 初始化view
     */
    private void initView() {  
        tv_tip = (TextView) findViewById(R.id.acc_tv1);
        btn_control = (Button) findViewById(R.id.acc_btn1);
        progressBar = (ProgressBar) findViewById(R.id.progressBar1);
        tv1 = (TextView) findViewById(R.id.acc_tv2);
        cacheLayout = (LinearLayout) findViewById(R.id.cache_linear);
        pm = getPackageManager();
    }

    /**
     * 扫描按钮事件监听
     * 
     * 点击按钮，清空缓存 ：立即清理全部缓存 需要权限:android.permission.CLEAR_APP_CACHE
     * @param v
     */
    public void onControl(View v){
        if(!isScanOver){//点击开始扫描
            doScan();
        }else {//扫描完成，一键清理
            doCleanCache();
        }
    }
    public void doCleanCache() {
        //通过反射，获得缓存大小
        Method method;
        try {
            /**
             * 向系统请求尽更多空间,系统为了凑空间，就只能清理缓存,间接达到清理全部缓存的目的
             */
            method = pm.getClass().getMethod("freeStorageAndNotify", long.class,IPackageDataObserver.class);
            method.invoke(pm, Long.MAX_VALUE,new IPackageDataObserver.Stub() {
                public void onRemoveCompleted(String packageName, boolean succeeded)
                        throws RemoteException {
                    System.out.println("是否清理缓存成功："+succeeded);
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
        btn_control.setText("完成");

    }

    /**
     * 扫描
     */
    public void  doScan() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                //获取已安装的应用程序的信息, packageInfo存储包的整体内容信息
                List<PackageInfo> packages =  
                        pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
                progressBar.setMax(packages.size());
                int progress = 0;
                //遍历每个包信息
                for(PackageInfo info : packages){
                    //应用名称
                    String packageName = info.applicationInfo.loadLabel(pm).toString();

                    try {
                        //通过反射， 获取缓存大小
                        Method method = pm.getClass().
                                getMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
                        //调用方法
                        method.invoke(pm, packageName, new MyStatsObserver());
                        progress++;
                        progressBar.setProgress(progress);

                        //更新进度
                        Message msg = Message.obtain();
                        msg.what = 1;
                        msg.obj = packageName;
                        myHandler.sendMessage(msg);

                        //休眠
                        Thread.sleep(50);

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                Message msg = Message.obtain();
                myHandler.sendEmptyMessage(0);
            }
        }).start();
    }

    /**
     * 处理缓存处理的进程
     */
    private Handler myHandler = new Handler() {
        public void handleMessage(Message msg) {
            if(msg.what == 1){//正在扫描， 每次更新扫描信息，
                tv_tip.setText("正在扫描"+msg.obj);
            }else if(msg.what == 0){
                tv_tip.setText("扫描完毕");
                btn_control.setText("一键清理");
                tv1.setText("扫描完毕");
                isScanOver = true;
            }else if(msg.what == 2){//有缓存
                final CacheInfo info = (CacheInfo) msg.obj;

                View view = View.inflate(getApplicationContext(), R.layout.cache_info, null);
                ImageView icon = (ImageView) view.findViewById(R.id.cache_iv_icon);
                ImageView delete=(ImageView) view.findViewById(R.id.cache_iv_delete);

                TextView tvTitle=(TextView) view.findViewById(R.id.cache_tv_title);
                TextView tvCache=(TextView) view.findViewById(R.id.cache_tv_cache_size);

                //设置每个缓存应用的信息
                icon.setImageDrawable(info.icon);
                tvTitle.setText(info.name);
                tvCache.setText("缓存大小为:"+Formatter.formatFileSize(getApplicationContext(), info.cacheSize));
                cacheLayout.addView(view,0);
                delete.setOnClickListener(
                        new OnClickListener() {
                            public void onClick(View v) {
                                //清理单个缓存，跳转到系统设置界面
                                Intent intent = new Intent();
                                intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                                intent.setData(Uri.parse("package:"+info.packageName));
                                intent.addCategory(Intent.CATEGORY_DEFAULT);
                                startActivity(intent);
                            }
                        });
            }
        };
    };



    /**
     *  
     */
    class MyStatsObserver extends IPackageStatsObserver.Stub{
        //在子线程运行
        @Override
        public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
                throws RemoteException {
            //缓存大小
            long cacheSize = pStats.cacheSize;
            //安装包大小
            long codeSize = pStats.codeSize;
            //数据包大小
            long dataSize = pStats.dataSize;
            if(cacheSize > 0 ){
                //获取图标，名称，缓存大小
                String packageName=pStats.packageName;
                try {
                    ApplicationInfo app = pm.getApplicationInfo(packageName, 0);
                    CacheInfo info = new CacheInfo(); 
                    info.name = app.loadLabel(pm).toString();
                    info.icon = app.loadIcon(pm);
                    info.cacheSize = cacheSize;
                    info.packageName = packageName;


                    //通知更新界面
                    Message message = Message.obtain();
                    message.what = 2;//有缓存时发消息
                    message.obj = info;
                    myHandler.sendMessage(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        }

    }



}