Android擷取應用程式大小和緩衝的執行個體代碼_Android

info

package com.qin.appsize;import android.content.Intent;import android.graphics.drawable.Drawable;//Model類 ，用來儲存應用程式資訊public class AppInfo {private String appLabel; //應用程式標籤private Drawable appIcon ; //應用程式映像private Intent intent ; //啟動應用程式的Intent ，一般是Action為Main和Category為Lancher的Activityprivate String pkgName ; //應用程式所對應的包名private long cachesize ; //緩衝大小private long datasize ; //資料大小private long codesieze ; //應用程式大小public long getCachesize() {return cachesize;}public void setCachesize(long cachesize) {this.cachesize = cachesize;}public long getDatasize() {return datasize;}public void setDatasize(long datasize) {this.datasize = datasize;}public long getCodesieze() {return codesieze;}public void setCodesieze(long codesieze) {this.codesieze = codesieze;}public AppInfo(){}public String getAppLabel() {return appLabel;}public void setAppLabel(String appName) {this.appLabel = appName;}public Drawable getAppIcon() {return appIcon;}public void setAppIcon(Drawable appIcon) {this.appIcon = appIcon;}public Intent getIntent() {return intent;}public void setIntent(Intent intent) {this.intent = intent;}public String getPkgName(){return pkgName ;}public void setPkgName(String pkgName){this.pkgName=pkgName ;}}

自訂的類

package com.qin.appsize;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;//自訂配接器類，提供給listView的自訂viewpublic class BrowseApplicationInfoAdapter extends BaseAdapter {private List<AppInfo> mlistAppInfo = null;LayoutInflater infater = null;public BrowseApplicationInfoAdapter(Context context, List<AppInfo> apps) {infater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);mlistAppInfo = apps ;}@Overridepublic int getCount() {// TODO Auto-generated method stubSystem.out.println("size" + mlistAppInfo.size());return mlistAppInfo.size();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn mlistAppInfo.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn 0;}@Overridepublic View getView(int position, View convertview, ViewGroup arg2) {System.out.println("getView at " + position);View view = null;ViewHolder holder = null;if (convertview == null || convertview.getTag() == null) {view = infater.inflate(R.layout.browse_app_item, null);holder = new ViewHolder(view);view.setTag(holder);} else{view = convertview ;holder = (ViewHolder) convertview.getTag() ;}AppInfo appInfo = (AppInfo) getItem(position);holder.appIcon.setImageDrawable(appInfo.getAppIcon());holder.tvAppLabel.setText(appInfo.getAppLabel());holder.tvPkgName.setText(appInfo.getPkgName());return view;}class ViewHolder {ImageView appIcon;TextView tvAppLabel;TextView tvPkgName;public ViewHolder(View view) {this.appIcon = (ImageView) view.findViewById(R.id.imgApp);this.tvAppLabel = (TextView) view.findViewById(R.id.tvAppLabel);this.tvPkgName = (TextView) view.findViewById(R.id.tvPkgName);}}}

主類

package com.qin.appsize;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.Collections;import java.util.List;import com.qin.appsize.AppInfo;import android.app.Activity;import android.app.AlertDialog;import android.content.ComponentName;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.IPackageStatsObserver;import android.content.pm.PackageManager;import android.content.pm.PackageStats;import android.content.pm.ResolveInfo;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.os.RemoteException;import android.text.format.Formatter;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.TextView;import android.widget.AdapterView.OnItemClickListener;public class MainActivity extends Activity implements OnItemClickListener{private static String TAG = "APP_SIZE";private ListView listview = null;private List<AppInfo> mlistAppInfo = null;LayoutInflater infater = null ; //全域變數，儲存當前查詢包得資訊private long cachesize ; //緩衝大小private long datasize ; //資料大小 private long codesize ; //應用程式大小private long totalsize ; //總大小@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.browse_app_list);listview = (ListView) findViewById(R.id.listviewApp);mlistAppInfo = new ArrayList<AppInfo>();queryAppInfo(); // 查詢所有應用程式資訊BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(this, mlistAppInfo);listview.setAdapter(browseAppAdapter);listview.setOnItemClickListener(this);}// 點擊彈出對話方塊，顯示該包得大小public void onItemClick(AdapterView<?> arg0, View view, int position,long arg3) {//更新顯示當前包得大小資訊try {queryPacakgeSize(mlistAppInfo.get(position).getPkgName());} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} infater = (LayoutInflater) MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);View dialog = infater.inflate(R.layout.dialog_app_size, null) ;TextView tvcachesize =(TextView) dialog.findViewById(R.id.tvcachesize) ; //緩衝大小TextView tvdatasize = (TextView) dialog.findViewById(R.id.tvdatasize) ; //資料大小TextView tvcodesize = (TextView) dialog.findViewById(R.id.tvcodesize) ; // 應用程式大小TextView tvtotalsize = (TextView) dialog.findViewById(R.id.tvtotalsize) ; //總大小//類型轉換並賦值tvcachesize.setText(formateFileSize(cachesize));tvdatasize.setText(formateFileSize(datasize)) ;tvcodesize.setText(formateFileSize(codesize)) ;tvtotalsize.setText(formateFileSize(totalsize)) ;//顯示自訂對話方塊AlertDialog.Builder builder =new AlertDialog.Builder(MainActivity.this) ;builder.setView(dialog) ;builder.setTitle(mlistAppInfo.get(position).getAppLabel()+"的大小資訊為：") ;builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubdialog.cancel() ; // 取消顯示對話方塊}});builder.create().show() ;}public void queryPacakgeSize(String pkgName) throws Exception{if ( pkgName != null){//使用放射機製得到PackageManager類的隱藏函數getPackageSizeInfoPackageManager pm = getPackageManager(); //得到pm對象try {//通過反射機制獲得該隱藏函數Method getPackageSizeInfo = pm.getClass().getDeclaredMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);//調用該函數，並且給其分配參數 ，待調用流程完成後會回調PkgSizeObserver類的函數getPackageSizeInfo.invoke(pm, pkgName,new PkgSizeObserver());} catch(Exception ex){Log.e(TAG, "NoSuchMethodException") ;ex.printStackTrace() ;throw ex ; // 拋出異常} }}//aidl檔案形成的Bindler機制服務類public class PkgSizeObserver extends IPackageStatsObserver.Stub{/*** 回呼函數，* @param pStatus ,返回資料封裝在PackageStats對象中* @param succeeded 代表回調成功*/ @Overridepublic void onGetStatsCompleted(PackageStats pStats, boolean succeeded)throws RemoteException {// TODO Auto-generated method stubcachesize = pStats.cacheSize ; //緩衝大小datasize = pStats.dataSize ; //資料大小 codesize = pStats.codeSize ; //應用程式大小totalsize = cachesize + datasize + codesize ;Log.i(TAG, "cachesize--->"+cachesize+" datasize---->"+datasize+ " codeSize---->"+codesize) ;}}//系統函數，字串轉換 long -String (kb)private String formateFileSize(long size){return Formatter.formatFileSize(MainActivity.this, size); }// 獲得所有啟動Activity的資訊，類似於Launch介面public void queryAppInfo() {PackageManager pm = this.getPackageManager(); // 獲得PackageManager對象Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);// 通過查詢，獲得所有ResolveInfo對象.List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent, 0);// 調用系統排序 ， 根據name排序// 該排序很重要，否則只能顯示系統應用，而不能列出第三方應用程式Collections.sort(resolveInfos,new ResolveInfo.DisplayNameComparator(pm));if (mlistAppInfo != null) {mlistAppInfo.clear();for (ResolveInfo reInfo : resolveInfos) {String activityName = reInfo.activityInfo.name; // 獲得該應用程式的啟動Activity的nameString pkgName = reInfo.activityInfo.packageName; // 獲得應用程式的包名String appLabel = (String) reInfo.loadLabel(pm); // 獲得應用程式的LabelDrawable icon = reInfo.loadIcon(pm); // 獲得應用程式圖示// 為應用程式的啟動Activity 準備IntentIntent launchIntent = new Intent();launchIntent.setComponent(new ComponentName(pkgName,activityName));// 建立一個AppInfo對象，並賦值AppInfo appInfo = new AppInfo();appInfo.setAppLabel(appLabel);appInfo.setPkgName(pkgName);appInfo.setAppIcon(icon);appInfo.setIntent(launchIntent);mlistAppInfo.add(appInfo); // 添加至列表中}}}}

以上所述是小編給大家介紹的Android擷取應用程式大小和緩衝的執行個體代碼，希望對大家有所協助，如果大家有任何疑問請給我留言，小編會及時回複大家的。在此也非常感謝大家對雲棲社區網站的支援！