以编程方式清除 android 应用程序中的缓存
Clearing Cache in android App Programmatically
我需要有关 android 应用程序缓存内存的帮助。我是设备中的 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,我的客户操作正在进行中。所以我不希望它(数据库)受到影响。我只想清除缓存而不是清除数据。请帮我解决这个问题。
清除缓存代码:
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();
} else if (dir!= null && dir.isFile()) {
return dir.delete();
}
return false;
}
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;
}
}
在 Kotlin 上你可以直接调用
File(context.cacheDir.path).deleteRecursively()
我需要有关 android 应用程序缓存内存的帮助。我是设备中的 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,我的客户操作正在进行中。所以我不希望它(数据库)受到影响。我只想清除缓存而不是清除数据。请帮我解决这个问题。
清除缓存代码:
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();
} else if (dir!= null && dir.isFile()) {
return dir.delete();
}
return false;
}
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;
}
}
在 Kotlin 上你可以直接调用
File(context.cacheDir.path).deleteRecursively()