android AIDL实践之清理应用缓存

1、把下面两个aidl文件放在自己的工程中，自己的项目视为客户端，来实现跨进程通信。

代码如下：

建立包名：

/***** Copyright 2007, The Android Open Source Project**** Licensed under the Apache License, Version 2.0 (the "License");** you may not use this file except in compliance with the License.** You may obtain a copy of the License at****     http://www.apache.org/licenses/LICENSE-2.0**** Unless required by applicable law or agreed to in writing, software** distributed under the License is distributed on an "AS IS" BASIS,** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.** See the License for the specific language governing permissions and** limitations under the License.*/package android.content.pm;import android.content.pm.PackageStats;/** * API for package data change related callbacks from the Package Manager. * Some usage scenarios include deletion of cache directory, generate * statistics related to code, data, cache usage(TODO) * {@hide} */oneway interface IPackageStatsObserver {        void onGetStatsCompleted(in PackageStats pStats, boolean succeeded);}

/* //device/java/android/android/view/WindowManager.aidl**** Copyright 2007, The Android Open Source Project**** Licensed under the Apache License, Version 2.0 (the "License"); ** you may not use this file except in compliance with the License. ** You may obtain a copy of the License at ****     http://www.apache.org/licenses/LICENSE-2.0 **** Unless required by applicable law or agreed to in writing, software ** distributed under the License is distributed on an "AS IS" BASIS, ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. ** See the License for the specific language governing permissions and ** limitations under the License.*/package android.content.pm;parcelable PackageStats;

2、在activity界面利用Java反射实现

package com.example.yqqmobilesafe.cleanache;import java.lang.reflect.Method;import java.util.List;import android.app.Activity;import android.content.Intent;import android.content.pm.IPackageStatsObserver;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;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.widget.ImageView;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.TextView;import com.example.yqqmobilesafe.R;/** * 清理缓存 * @author yqq * */public class CleanCacheActivity extends Activity {private PackageManager pm;private LinearLayout mContainer;//用来存放待清理垃圾的应用private ProgressBar mProgressBar;//显示扫描的进度private TextView tvScanAppName;//应用名private final int SCANING_FINISH=1;//扫描应用结束private final int SCANNING=2;//扫描中//private MyPackageInfo info;private Handler mHandler=new Handler(){@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case SCANING_FINISH:tvScanAppName.setText("扫描完成");break;case SCANNING://返回应用的信息final MyPackageInfo info=(MyPackageInfo) msg.obj;//获得应用名//String appName=info.packName;tvScanAppName.setText("正在扫描:"+info.packName);if(info.cacheSize>0){//将应用展示在界面容器上View view=View.inflate(CleanCacheActivity.this,R.layout.app_cache_info_item,null);//设置事件监听view.setClickable(true);view.setBackgroundResource(R.drawable.ache_clear_item_bg_selector);//清空缓存数据view.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// 开启设置界面Intent intent = new Intent();intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");intent.setData(Uri.parse("package:"+info.packName ));startActivity(intent);}});ImageView appIconIV=(ImageView) view.findViewById(R.id.iv_app_icon);TextView appNameTV=(TextView) view.findViewById(R.id.tv_app_name);TextView appCacheSizeTV=(TextView) view.findViewById(R.id.tv_app_cache_size);TextView appDataSizeTV=(TextView) view.findViewById(R.id.tv_app_code_size);//设置显示数据try {appIconIV.setImageDrawable(pm.getApplicationInfo(info.packName, 0).loadIcon(pm));} catch (NameNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}appNameTV.setText(info.packName);appCacheSizeTV.setText("缓存大小:"+Formatter.formatFileSize(getApplicationContext(), info.cacheSize));appDataSizeTV.setText("数据大小"+Formatter.formatFileSize(getApplicationContext(), info.dataSize));mContainer.addView(view,0);}break;}super.handleMessage(msg);}};public CleanCacheActivity() {}@Overrideprotected void onCreate(Bundle savedInstanceState) {setContentView(R.layout.activity_cache_clear);init();super.onCreate(savedInstanceState);}/** * 初始化信息 */private void init() {mContainer=(LinearLayout) this.findViewById(R.id.ll_container);tvScanAppName=(TextView) this.findViewById(R.id.tv_scaning_app_name);mProgressBar=(ProgressBar) this.findViewById(R.id.pb);pm=getPackageManager();scanAppCache();}/** * 扫描应用获得待清理的应用 */private void scanAppCache(){new Thread(new Runnable() {@Overridepublic void run() {List<PackageInfo> infos=pm.getInstalledPackages(0);//获得已经安装应用的信息mProgressBar.setMax(infos.size());//设置进度条的最大数目int total=0;for(PackageInfo info:infos){getPackageSize(info.packageName);try {Thread.sleep(300);total++;mProgressBar.setProgress(total);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}Message message=Message.obtain();message.what=SCANING_FINISH;//扫描完成mHandler.sendMessage(message);}}).start();}/** * 通过反射获得应用的大小 * @param packName应用的包名 */private void getPackageSize(String packName){try {Method method=PackageManager.class.getMethod("getPackageSizeInfo", new Class[]{String.class,IPackageStatsObserver.class});method.invoke(pm,new Object[]{packName,new MyObserver(packName)}); } catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 定义一个包状态观察者获得数据缓存，代码大小，数据大小 * @author yqq * */private class MyObserver extends IPackageStatsObserver.Stub{private String packName;//应用的包名public MyObserver(String packName) {super();this.packName = packName;}@Overridepublic void onGetStatsCompleted(PackageStats pStats, boolean succeeded)throws RemoteException {//获得每个应用的大小MyPackageInfo myPackageInfo=new MyPackageInfo();myPackageInfo.dataSize=pStats.dataSize;myPackageInfo.cacheSize=pStats.cacheSize;myPackageInfo.packName=packName;Message message=Message.obtain();message.obj=myPackageInfo;message.what=SCANNING;mHandler.sendMessage(message);myPackageInfo=null;}}private class MyPackageInfo{String packName;//应用的包名long dataSize;//数据大小long cacheSize;//缓存大小}}