我的手机管家（15） 缓存处理 逻辑代码
private PackageManager pm;//包管理器
//获取包管理器
pm = getPackageManager();
使用子线程获取应用程序的整体包信息, PackageInfo 存储包的整体信息
List<PackageInfo> packages = pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
//开始遍历每个包，获取图标，名称， 大小 等信息
for(PackageInfo pi : packages){
//通过packageInfo 来获取应用包名
String packagename = pi.applicationInfo.loadLoacl(pm).toString();
//通过反射， 获取缓存大小 //从PackageManager中获取方法名getPackageSizeInfo,
参数列表的类型是String.class,IPackageStatsObserver.class， 获取方法
Method method = pm.getClass().
getMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
//调用方法
method.invoke(pm, packageName, new MyStatsObserver());
}
使用进程通信
extends IPackageStatsObserver.Stub， 获取包的具体信息
/**
*
*/
class MyStatsObserver extends IPackageStatsObserver.Stub{
//在子线程运行
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
//缓存大小
long cacheSize = pStats.cacheSize;
//安装包大小
long codeSize = pStats.codeSize;
//数据包大小
long dataSize = pStats.dataSize;
if(cacheSize > 0 ){
//获取图标，名称，缓存大小
String packageName=pStats.packageName;
try {
ApplicationInfo app = pm.getApplicationInfo(packageName, 0);
CacheInfo info = new CacheInfo();
info.name = app.loadLabel(pm).toString();
info.icon = app.loadIcon(pm);
info.cacheSize = cacheSize;
info.packageName = packageName;
//通知更新界面
Message message = Message.obtain();
message.what = 2;//有缓存时发消息
message.obj = info;
myHandler.sendMessage(message);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
/**
* 扫描
*/
public void doScan() {
new Thread(new Runnable() {
@Override
public void run() {
//获取已安装的应用程序的信息, packageInfo存储包的整体内容信息
List<PackageInfo> packages =
pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
progressBar.setMax(packages.size());
int progress = 0;
//遍历每个包信息
for(PackageInfo info : packages){
//应用名称
String packageName = info.applicationInfo.loadLabel(pm).toString();
try {
//通过反射， 获取缓存大小
Method method = pm.getClass().
getMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
//调用方法
method.invoke(pm, packageName, new MyStatsObserver());
progress++;
progressBar.setProgress(progress);
//更新进度
Message msg = Message.obtain();
msg.what = 1;
msg.obj = packageName;
myHandler.sendMessage(msg);
//休眠
Thread.sleep(50);
} catch (Exception e) {
e.printStackTrace();
}
}
Message msg = Message.obtain();
myHandler.sendEmptyMessage(0);
}
}).start();
}
package com.chb.myphonesave.activity;
import java.lang.reflect.Method;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.IPackageDataObserver;
import android.content.pm.IPackageStatsObserver;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
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.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.chb.myphonesave.R;
import com.chb.myphonesave.entity.CacheInfo;
/**
* 缓存清理
* 1 正在扫描
* 2 扫描完成
*
*/
public class CacheCleanActivity extends Activity {
boolean isScanOver;//是否是已扫描完成;
TextView tv_tip;//显示正在扫描应用的名称
TextView tv1; //正在扫描
ProgressBar progressBar;
LinearLayout cacheLayout;
private PackageManager pm;//包管理器
Button btn_control;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_cacheclean);
initView();
}
/**
* 初始化view
*/
private void initView() {
tv_tip = (TextView) findViewById(R.id.acc_tv1);
btn_control = (Button) findViewById(R.id.acc_btn1);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);
tv1 = (TextView) findViewById(R.id.acc_tv2);
cacheLayout = (LinearLayout) findViewById(R.id.cache_linear);
pm = getPackageManager();
}
/**
* 扫描按钮事件监听
*
* 点击按钮，清空缓存 ：立即清理全部缓存 需要权限:android.permission.CLEAR_APP_CACHE
* @param v
*/
public void onControl(View v){
if(!isScanOver){//点击开始扫描
doScan();
}else {//扫描完成，一键清理
doCleanCache();
}
}
public void doCleanCache() {
//通过反射，获得缓存大小
Method method;
try {
/**
* 向系统请求尽更多空间,系统为了凑空间，就只能清理缓存,间接达到清理全部缓存的目的
*/
method = pm.getClass().getMethod("freeStorageAndNotify", long.class,IPackageDataObserver.class);
method.invoke(pm, Long.MAX_VALUE,new IPackageDataObserver.Stub() {
public void onRemoveCompleted(String packageName, boolean succeeded)
throws RemoteException {
System.out.println("是否清理缓存成功："+succeeded);
}
});
} catch (Exception e) {
e.printStackTrace();
}
btn_control.setText("完成");
}
/**
* 扫描
*/
public void doScan() {
new Thread(new Runnable() {
@Override
public void run() {
//获取已安装的应用程序的信息, packageInfo存储包的整体内容信息
List<PackageInfo> packages =
pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
progressBar.setMax(packages.size());
int progress = 0;
//遍历每个包信息
for(PackageInfo info : packages){
//应用名称
String packageName = info.applicationInfo.loadLabel(pm).toString();
try {
//通过反射， 获取缓存大小
Method method = pm.getClass().
getMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
//调用方法
method.invoke(pm, packageName, new MyStatsObserver());
progress++;
progressBar.setProgress(progress);
//更新进度
Message msg = Message.obtain();
msg.what = 1;
msg.obj = packageName;
myHandler.sendMessage(msg);
//休眠
Thread.sleep(50);
} catch (Exception e) {
e.printStackTrace();
}
}
Message msg = Message.obtain();
myHandler.sendEmptyMessage(0);
}
}).start();
}
/**
* 处理缓存处理的进程
*/
private Handler myHandler = new Handler() {
public void handleMessage(Message msg) {
if(msg.what == 1){//正在扫描， 每次更新扫描信息，
tv_tip.setText("正在扫描"+msg.obj);
}else if(msg.what == 0){
tv_tip.setText("扫描完毕");
btn_control.setText("一键清理");
tv1.setText("扫描完毕");
isScanOver = true;
}else if(msg.what == 2){//有缓存
final CacheInfo info = (CacheInfo) msg.obj;
View view = View.inflate(getApplicationContext(), R.layout.cache_info, null);
ImageView icon = (ImageView) view.findViewById(R.id.cache_iv_icon);
ImageView delete=(ImageView) view.findViewById(R.id.cache_iv_delete);
TextView tvTitle=(TextView) view.findViewById(R.id.cache_tv_title);
TextView tvCache=(TextView) view.findViewById(R.id.cache_tv_cache_size);
//设置每个缓存应用的信息
icon.setImageDrawable(info.icon);
tvTitle.setText(info.name);
tvCache.setText("缓存大小为:"+Formatter.formatFileSize(getApplicationContext(), info.cacheSize));
cacheLayout.addView(view,0);
delete.setOnClickListener(
new OnClickListener() {
public void onClick(View v) {
//清理单个缓存，跳转到系统设置界面
Intent intent = new Intent();
intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
intent.setData(Uri.parse("package:"+info.packageName));
intent.addCategory(Intent.CATEGORY_DEFAULT);
startActivity(intent);
}
});
}
};
};
/**
*
*/
class MyStatsObserver extends IPackageStatsObserver.Stub{
//在子线程运行
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
//缓存大小
long cacheSize = pStats.cacheSize;
//安装包大小
long codeSize = pStats.codeSize;
//数据包大小
long dataSize = pStats.dataSize;
if(cacheSize > 0 ){
//获取图标，名称，缓存大小
String packageName=pStats.packageName;
try {
ApplicationInfo app = pm.getApplicationInfo(packageName, 0);
CacheInfo info = new CacheInfo();
info.name = app.loadLabel(pm).toString();
info.icon = app.loadIcon(pm);
info.cacheSize = cacheSize;
info.packageName = packageName;
//通知更新界面
Message message = Message.obtain();
message.what = 2;//有缓存时发消息
message.obj = info;
myHandler.sendMessage(message);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
时间： 2024-11-10 13:49:11