我需要一个关于我的Android应用程序中的缓存内存的帮助。我正在设备中运行服务器(android)。我想以编程方式清除该应用程序的缓存。我在该服务器中有数据库。基于该数据库,我的客户端操作正在进行中。所以我不希望它(数据库)受到影响。我只是想清除缓存而不是清除数据。请帮帮我。
答案 0 :(得分:3)
import java.io.File;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
public class HelloWorld extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle *) {
super.onCreate(*);
setContentView(R.layout.main);
}
@Override
protected void onStop(){
super.onStop();
}
//Fires after the OnStop() state
@Override
protected void onDestroy() {
super.onDestroy();
try {
trimCache(this);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void trimCache(Context context) {
try {
File dir = context.getCacheDir();
deleteDir(dir);
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
return dir.delete();
}
else {
return false;
}
}
答案 1 :(得分:2)
清除缓存的代码:
public static void deleteCache(Context context) {
try {
File dir = context.getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
return dir.delete();
}
return false;
}
答案 2 :(得分:0)
在Kotlin上,您可以致电
File(context.cacheDir.path).deleteRecursively()