Android獲取應用程序大小和緩存的實例代碼

info

package com.qin.appsize;
import android.content.Intent;
import android.graphics.drawable.Drawable;
//Model類 ，用來存儲應用程序信息
public class AppInfo {
private String appLabel; //應用程序標簽
private Drawable appIcon ; //應用程序圖像
private Intent intent ; //啟動應用程序的Intent ，一般是Action為Main和Category為Lancher的Activity
private String pkgName ; //應用程序所對應的包名
private long cachesize ; //緩存大小
private long datasize ; //數據大小
private long codesieze ; //應用程序大小
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 ;
}
}

自定義的類

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;
//自定義適配器類，提供給listView的自定義view
public 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 ;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
System.out.println("size" + mlistAppInfo.size());
return mlistAppInfo.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mlistAppInfo.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public 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 ; 
//全局變量，保存當前查詢包得信息
private long cachesize ; //緩存大小
private long datasize ; //數據大小 
private long codesize ; //應用程序大小
private long totalsize ; //總大小
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.browse_app_list);
listview = (ListView) findViewById(R.id.listviewApp);
mlistAppInfo = new ArrayList<AppInfo>();
queryAppInfo(); // 查詢所有應用程序信息
BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(
this, mlistAppInfo);
listview.setAdapter(browseAppAdapter);
listview.setOnItemClickListener(this);
}
// 點擊彈出對話框，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信息
try {
queryPacakgeSize(mlistAppInfo.get(position).getPkgName());
} catch (Exception e) {
// TODO Auto-generated catch block
e.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) ; //緩存大小
TextView tvdatasize = (TextView) dialog.findViewById(R.id.tvdatasize) ; //數據大小
TextView tvcodesize = (TextView) dialog.findViewById(R.id.tvcodesize) ; // 應用程序大小
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)) ;
//顯示自定義對話框
AlertDialog.Builder builder =new AlertDialog.Builder(MainActivity.this) ;
builder.setView(dialog) ;
builder.setTitle(mlistAppInfo.get(position).getAppLabel()+"的大小信息為：") ;
builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel() ; // 取消顯示對話框
}
});
builder.create().show() ;
}
public void queryPacakgeSize(String pkgName) throws Exception{
if ( pkgName != null){
//使用放射機制得到PackageManager類的隱藏函數getPackageSizeInfo
PackageManager 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文件形成的Bindler機制服務類
public class PkgSizeObserver extends IPackageStatsObserver.Stub{
/*** 回調函數，
* @param pStatus ,返回數據封裝在PackageStats對象中
* @param succeeded 代表回調成功
*/ 
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
// TODO Auto-generated method stub
cachesize = pStats.cacheSize ; //緩存大小
datasize = pStats.dataSize ; //數據大小 
codesize = pStats.codeSize ; //應用程序大小
totalsize = cachesize + datasize + codesize ;
Log.i(TAG, "cachesize--->"+cachesize+" datasize---->"+datasize+ " codeSize---->"+codesize) ;
}
}
//系統函數，字符串轉換 long -String (kb)
private String formateFileSize(long size){
return Formatter.formatFileSize(MainActivity.this, size); 
}
// 獲得所有啟動Activity的信息，類似於Launch界面
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序
Collections.sort(resolveInfos,new ResolveInfo.DisplayNameComparator(pm));
if (mlistAppInfo != null) {
mlistAppInfo.clear();
for (ResolveInfo reInfo : resolveInfos) {
String activityName = reInfo.activityInfo.name; // 獲得該應用程序的啟動Activity的name
String pkgName = reInfo.activityInfo.packageName; // 獲得應用程序的包名
String appLabel = (String) reInfo.loadLabel(pm); // 獲得應用程序的Label
Drawable icon = reInfo.loadIcon(pm); // 獲得應用程序圖標
// 為應用程序的啟動Activity 准備Intent
Intent launchIntent = new Intent();
launchIntent.setComponent(new ComponentName(pkgName,activityName));
// 創建一個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獲取應用程序大小和緩存的實例代碼，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對本站網站的支持！