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();
@Override
protected 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);
}
@Override
public void onClick(View v) {
cacheS = 0;
if (v.getId() == btnScanCache.getId()) {
getCaches();
} else if (v.getId() == btnClearAll.getId()) {
cleanAll(v);
getCaches();
}
}
class MyPackageStateObserver extends IPackageStatsObserver.Stub {
@Override
public 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;
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 {
@Override
public void onRemoveCompleted(String packageName, final boolean succeeded) throws RemoteException {
mHadler.post(new Runnable() {
@Override
public 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) {
Method[] 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(){
pm = getPackageManager();
List 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();
}
}
mHadler.postDelayed(new Runnable() {
@Override
public 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);
}
}
<uses-permission android:name="android.permission.CLEAR_APP_CACHE" />
<uses-permission android:name="android.permission.GET_PACKAGE_SIZE"/>
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
