Android手机缓存的清理

步骤
- 1.获取手机所有app缓存
- 2.清理缓存
- 3.获取所有app缓存（检查第二步是否成功）
代码

package com.pythoncat.clearcache;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.os.Bundle;
import android.os.Handler;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.text.format.Formatter;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;import java.lang.reflect.Method;
import java.util.List;public class MainActivity extends AppCompatActivity implements View.OnClickListener {private TextView tvShowCaches, tvAppCache;private Button btnScanCache, btnClearAll;private PackageManager pm;StringBuilder sb = new StringBuilder();StringBuilder sbCache = new StringBuilder();private long cacheS;Handler mHadler = new Handler();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btnScanCache = (Button) findViewById(R.id.btn_scanCache);btnClearAll = (Button) findViewById(R.id.btn_clearAll);tvShowCaches = (TextView) findViewById(R.id.tv_showAppInfo);tvAppCache = (TextView) findViewById(R.id.tv_appCache);sbCache.append("所有缓存：\n");tvAppCache.setText(sbCache.toString());btnScanCache.setOnClickListener(this);btnClearAll.setOnClickListener(this);}@Overridepublic void onClick(View v) {cacheS = 0;if (v.getId() == btnScanCache.getId()) {getCaches();
//            ==========获取每个app的缓存} else if (v.getId() == btnClearAll.getId()) {cleanAll(v);getCaches();}}class MyPackageStateObserver extends IPackageStatsObserver.Stub {@Overridepublic void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {String packageName = pStats.packageName;long cacheSize = pStats.cacheSize;long codeSize = pStats.codeSize;long dataSize = pStats.dataSize;cacheS += cacheSize;
//            sb.delete(0, sb.length());if (cacheSize > 0) {sb.append("packageName = " + packageName + "\n").append("   cacheSize: " + cacheSize + "\n").append("   dataSize: " + dataSize + "\n").append("-----------------------\n");Log.e("aaaa", sb.toString());}}}class ClearCacheObj extends IPackageDataObserver.Stub {@Overridepublic void onRemoveCompleted(String packageName, final boolean succeeded) throws RemoteException {mHadler.post(new Runnable() {@Overridepublic void run() {Toast.makeText(getApplicationContext(), "清楚状态： " + succeeded, Toast.LENGTH_SHORT).show();}});}}/*** 清理全部应用程序缓存的点击事件** @param view*/public void cleanAll(View view) {//freeStorageAndNotifyMethod[] methods = PackageManager.class.getMethods();for (Method method : methods) {if ("freeStorageAndNotify".equals(method.getName())) {try {method.invoke(pm, Long.MAX_VALUE, new ClearCacheObj());} catch (Exception e) {e.printStackTrace();}return;}}}private void getCaches(){// scanpm = getPackageManager();List<PackageInfo> packages = pm.getInstalledPackages(0);int max = packages.size();int current = 0;sb.delete(0, sb.length());sb.append("所有已安装的app信息：\n");sb.append("所有App 总和：" + max + " \n");tvShowCaches.setText(sb.toString());for (PackageInfo pinfo : packages) {String packageName = pinfo.packageName;try {Method getPackageSizeInfo = PackageManager.class.getDeclaredMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);getPackageSizeInfo.invoke(pm, packageName, new MyPackageStateObserver());current++;} catch (Exception e) {current++;e.printStackTrace();}}//===到这里，数据准备完成mHadler.postDelayed(new Runnable() {@Overridepublic void run() {Toast.makeText(getApplicationContext(),"缓存信息获取完成",Toast.LENGTH_SHORT).show();sbCache.append(Formatter.formatFileSize(getApplicationContext(),cacheS)+"\n");tvShowCaches.setText(sb.toString());tvAppCache.setText(sbCache.toString());sbCache.delete(0,sbCache.length());}}, 1000);//ok,所有应用程序信息显示完成}
}

所需权限

<!-- 清除缓存时需要此权限 --><uses-permission android:name="android.permission.CLEAR_APP_CACHE" /><uses-permission android:name="android.permission.GET_PACKAGE_SIZE"/>

4.所需AIDL文件

android/content/pm/IPackageDataObserver.aidl
android/content/pm/IPackageStatsObserver.aidl
android/content/pm/PackageStats.aidl

*1.PackageStats.aidl

/* //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.IPackageDataObserver

/*
**
** 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;/*** 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 IPackageDataObserver {void onRemoveCompleted(in String packageName, boolean succeeded);
}

* 3.IPackageStatsObserver

/*
**
** 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);
}

5.运行环境 Android 5.0
6.开发环境 Android Studio
7.运行效果，OK。
8.完整项目已上传csdn，下载地址

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