手机安全卫士——缓存清理
CleanCacheActivity.java
/** * 缓存清理*/ public class CleanCacheActivity extends Activity { private PackageManager packageManager; private List<CacheInfo> cacheLists; private ListView list_view; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); initUI(); } private void initUI() { setContentView(R.layout.activity_clean_cache); list_view = (ListView) findViewById(R.id.list_view); //垃圾的集合 cacheLists = new ArrayList<CacheInfo>(); packageManager = getPackageManager(); new Thread(){ public void run(){ //安装到手机上所有的应用程序 List<PackageInfo> installedPackages = packageManager.getInstalledPackages(0); //获取应用程序的缓存大小 for (PackageInfo packageInfo : installedPackages) { getCacheSize(packageInfo); } handler.sendEmptyMessage(0); }; }.start(); } private Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { CacheAdapter adapter = new CacheAdapter(); list_view.setAdapter(adapter); }; }; private class CacheAdapter extends BaseAdapter{ private ViewHolder holder; @Override public int getCount() { // TODO Auto-generated method stub return cacheLists.size(); } @Override public Object getItem(int arg0) { // TODO Auto-generated method stub return cacheLists.get(arg0); } @Override public long getItemId(int arg0) { // TODO Auto-generated method stub return arg0; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub View view = null; if(convertView == null){ view = View.inflate(CleanCacheActivity.this, R.layout.item_clean_cache, null); holder = new ViewHolder(); System.out.println("111111111111"); holder.iv_icon = (ImageView) view.findViewById(R.id.iv_icon); holder.appname = (TextView) view.findViewById(R.id.tv_name); holder.cachesize = (TextView) view.findViewById(R.id.tv_cachesize); view.setTag(holder); }else{ view = convertView; holder = (ViewHolder) view.getTag(); } System.out.println("222222222222"); holder.iv_icon.setImageDrawable(cacheLists.get(position).icon); holder.appname.setText(cacheLists.get(position).appname); holder.cachesize.setText("缓存大小："+Formatter.formatFileSize(CleanCacheActivity.this, cacheLists.get(position).cachesize)); return view; } } static class ViewHolder{ ImageView iv_icon; TextView appname; TextView cachesize; } private void getCacheSize(PackageInfo packageInfo) { try { //Class<?> clazz = getClassLoader().loadClass("packageManager"); //通过反射得到缓存的大小,第三个参数是aidl对象,我们导入的包 Method method = PackageManager.class.getDeclaredMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class); /* * 第一个参数：当前这个方法由谁调用的,谁去调用当前这个方法 * 第二个参数：包名 */ method.invoke(packageManager, packageInfo.applicationInfo.packageName,new MyIPackageStatusObserver(packageInfo)); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } //aidl对象 private class MyIPackageStatusObserver extends IPackageStatsObserver.Stub{ private PackageInfo packageInfo; public MyIPackageAtatusObserver(PackageInfo packageInfo) { this.packageInfo = packageInfo; // TODO Auto-generated constructor stub } @Override public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException { // TODO Auto-generated method stub //获取到当前手机应用的缓存大小 long cachesize = pStats.cacheSize; if(cachesize>0){ //有缓存 System.out.println("当前应用的名字："+packageInfo.applicationInfo.loadLabel(packageManager)+"缓存的大小："+cachesize); CacheInfo cacheInfo = new CacheInfo(); Drawable icon = packageInfo.applicationInfo.loadIcon(packageManager); cacheInfo.icon = icon; String appname = packageInfo.applicationInfo.loadLabel(packageManager).toString(); cacheInfo.appname = appname; cacheInfo.cachesize = cachesize; cacheLists.add(cacheInfo); } } } static class CacheInfo{ Drawable icon; long cachesize; String appname ; } //全部清除 public void cleanAll(View view) { //获取到当前应用程序所有的方法 Method[] methods = packageManager.getClass().getMethods(); for(Method method:methods){ //判断当前的方法名 if(method.getName().equals("freeStorageAndNotify")){ try { method.invoke(packageManager, Integer.MAX_VALUE,new MyIPackageDataObserver()); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } UIUtils.showToast(CleanCacheActivity.this, "全部清除"); } private class MyIPackageDataObserver extends IPackageDataObserver.Stub{ @Override public void onRemoveCompleted(String packageName, boolean succeeded) throws RemoteException { // TODO Auto-generated method stub } } }
我们需要导入aidl文件,如下图 导入。 aidl是为了进程间通信.为了学习aidl，我们可以参考 http://www.open-open.com/lib/view/open1469494852171.html
activity_clean_cache.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView style="@style/TitleStyle" android:text="缓存清理" /> <ListView android:id="@+id/list_view" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="111" ></ListView> <!-- 让listview后渲染出来，就这样做 --> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="全部清除" android:onClick="cleanAll" android:background="@drawable/btn_green_selector" /> </LinearLayout>
item_clean_cache.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <ImageView android:id="@+id/iv_icon" android:layout_width="50dp" android:layout_height="50dp" android:src="@drawable/ic_launcher" /> <LinearLayout android:layout_width="174dp" android:layout_height="wrap_content" android:layout_weight="0.85" android:orientation="vertical" > <TextView android:id="@+id/tv_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text="应用的名字" android:textSize="20dp" /> <TextView android:id="@+id/tv_cachesize" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:text="缓存的大小" /> </LinearLayout> <ImageView android:layout_width="50dp" android:layout_height="50dp" android:src="@drawable/list_button_clean_default" /> </LinearLayout>
