編輯:關於Android編程
1、把下面兩個aidl文件放在自己的工程中,自己的項目視為客戶端,來實現跨進程通信。
代碼如下:
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反射實現
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; /** * 清理緩存 * @author yqq * */ public class CleanCacheActivity extends Activity { private PackageManager pm; private LinearLayout mContainer;//用來存放待清理垃圾的應用 private ProgressBar mProgressBar;//顯示掃描的進度 private TextView tvScanAppName;//應用名 private final int SCANING_FINISH=1;//掃描應用結束 private final int SCANNING=2;//掃描中 //private MyPackageInfo info; private Handler mHandler=new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what) { case SCANING_FINISH: tvScanAppName.setText("掃描完成"); break; case SCANNING: //返回應用的信息 final MyPackageInfo info=(MyPackageInfo) msg.obj; //獲得應用名 //String appName=info.packName; tvScanAppName.setText("正在掃描:"+info.packName); if(info.cacheSize>0){ //將應用展示在界面容器上 View view=View.inflate(CleanCacheActivity.this,R.layout.app_cache_info_item,null); //設置事件監聽 view.setClickable(true); view.setBackgroundResource(R.drawable.ache_clear_item_bg_selector); //清空緩存數據 view.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 開啟設置界面 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); //設置顯示數據 try { appIconIV.setImageDrawable(pm.getApplicationInfo( info.packName, 0).loadIcon(pm)); } catch (NameNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } appNameTV.setText(info.packName); appCacheSizeTV.setText("緩存大小:"+Formatter.formatFileSize(getApplicationContext(), info.cacheSize)); appDataSizeTV.setText("數據大小"+Formatter.formatFileSize(getApplicationContext(), info.dataSize)); mContainer.addView(view,0); } break; } super.handleMessage(msg); } }; public CleanCacheActivity() { } @Override protected 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(); } /** * 掃描應用獲得待清理的應用 */ private void scanAppCache(){ new Thread(new Runnable() { @Override public void run() { Listinfos=pm.getInstalledPackages(0);//獲得已經安裝應用的信息 mProgressBar.setMax(infos.size());//設置進度條的最大數目 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 block e.printStackTrace(); } } Message message=Message.obtain(); message.what=SCANING_FINISH;//掃描完成 mHandler.sendMessage(message); } }).start(); } /** * 通過反射獲得應用的大小 * @param packName應用的包名 */ 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 block e.printStackTrace(); } } /** * 定義一個包狀態觀察者獲得數據緩存,代碼大小,數據大小 * @author yqq * */ private class MyObserver extends IPackageStatsObserver.Stub{ private String packName;//應用的包名 public MyObserver(String packName) { super(); this.packName = packName; } @Override public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException { //獲得每個應用的大小 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;//應用的包名 long dataSize;//數據大小 long cacheSize;//緩存大小 } }
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