Java 长时间运行后,截击崩溃应用程序已投入使用
我正在实施从服务器获取更新的服务,如下所示:Java 长时间运行后,截击崩溃应用程序已投入使用,java,android,service,out-of-memory,android-volley,Java,Android,Service,Out Of Memory,Android Volley,我正在实施从服务器获取更新的服务,如下所示: public class Myupdates extends Service { private static final String TAG = "AutoUpdates"; private static final int started = 0; static SQLiteDatabase db; private boolean isRunning = false; private CountDow
public class Myupdates extends Service {
private static final String TAG = "AutoUpdates";
private static final int started = 0;
static SQLiteDatabase db;
private boolean isRunning = false;
private CountDownTimer timer;
@Override
public void onCreate() {
this.db = openOrCreateDatabase("db", Context.MODE_PRIVATE, null);
//Log.i(TAG, "Service onCreate");
isRunning = true;
}
int mCount = 1;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//Log.i(TAG, "Service onStartCommand");
//Creating new thread for my service
//Always write your long running tasks in a separate thread, to avoid ANR
new Thread(new Runnable() {
@Override
public void run() {
if (isRunning) {
new Timer().scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
updates();
}
}, 0, 30000);
}
//Stop service once it finishes its task
//stopSelf();
}
}).start();
return Service.START_STICKY;
}
@Override
public IBinder onBind(Intent arg0) {
//Log.i(TAG, "Service onBind");
return null;
}
@Override
public void onDestroy() {
isRunning = false;
//Log.i(TAG, "Service onDestroy");
}
/*
HANDLE ADVERTS
*/
protected void updates() {
/*
JSON
*/
final JSONObject json = new JSONObject();
final JSONObject manJson = new JSONObject();
try {
manJson.put("userid", "4444");
manJson.put("version", "6.0");
final String j = json.put("UPDATE", manJson).toString();
final String base_url = "https://myweburl.com";
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.POST, base_url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Log.i(TAG, "received "+response);
try {
JSONObject object = (JSONObject) new JSONTokener(response).nextValue();
String update = object.getString("UPDATE");
} catch (JSONException e) {
return;
}
return;
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//perform operation here after getting error
return;
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
//pack message into json
try {
params.put("data", j.toString());
} catch (Exception e) {
//Log.i(TAG,"Map error: Unable to compile post");
}
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Content-Type", "application/x-www-form-urlencoded");
return params;
}
};
// Add the request to the RequestQueue.
queue.add(stringRequest);
// ends here
return;
} catch (Exception e) {
//Log.i(TAG,"ERROR: Unable to get setup settings");
} // end exception write
return;
}
}
公共类MyUpdate扩展服务{
私有静态最终字符串标记=“自动更新”;
私有静态final int start=0;
静态数据库数据库;
私有布尔值isRunning=false;
私人倒计时;
@凌驾
public void onCreate(){
this.db=openOrCreateDatabase(“db”,Context.MODE_PRIVATE,null);
//Log.i(标记“serviceoncreate”);
isRunning=true;
}
int mCount=1;
@凌驾
公共int onStartCommand(Intent Intent、int标志、int startId){
//Log.i(标签,“服务启动命令”);
//为我的服务创建新线程
//始终在单独的线程中编写长时间运行的任务,以避免出现错误
新线程(newrunnable()){
@凌驾
公开募捐{
如果(正在运行){
新计时器().scheduleAtFixedRate(新计时器任务()){
@凌驾
公开募捐{
更新();
}
}, 0, 30000);
}
//完成任务后停止服务
//stopSelf();
}
}).start();
return Service.START\u STICKY;
}
@凌驾
公共IBinder onBind(意图arg0){
//Log.i(标签“服务绑定”);
返回null;
}
@凌驾
公共空间{
isRunning=false;
//Log.i(标签“服务存储”);
}
/*
处理广告
*/
受保护的无效更新(){
/*
JSON
*/
final JSONObject json=new JSONObject();
final JSONObject manJson=new JSONObject();
试一试{
manJson.put(“userid”,“4444”);
manJson.put(“版本”,“6.0”);
最后一个字符串j=json.put(“UPDATE”,manJson).toString();
最终字符串base_url=”https://myweburl.com";
//实例化RequestQueue。
RequestQueue=Volley.newRequestQueue(this);
//从提供的URL请求字符串响应。
StringRequest StringRequest=新建StringRequest(Request.Method.POST,base_url,new Response.Listener()){
@凌驾
公共void onResponse(字符串响应){
//Log.i(标签,“接收”+响应);
试一试{
JSONObject object=(JSONObject)新的JSONTokener(response).nextValue();
字符串更新=object.getString(“更新”);
}捕获(JSONException e){
返回;
}
返回;
}
},new Response.ErrorListener(){
@凌驾
公共无效onErrorResponse(截击错误){
//获取错误后在此处执行操作
返回;
}
}) {
@凌驾
受保护的映射getParams(){
Map params=新的HashMap();
//将消息打包为json
试一试{
参数put(“数据”,j.toString());
}捕获(例外e){
//Log.i(标记“映射错误:无法编译post”);
}
返回参数;
}
@凌驾
公共映射getHeaders()引发AuthFailureError{
Map params=新的HashMap();
参数put(“内容类型”、“应用程序/x-www-form-urlencoded”);
返回参数;
}
};
//将请求添加到RequestQueue。
添加(stringRequest);
//到此为止
返回;
}捕获(例外e){
//Log.i(标记“错误:无法获取设置设置”);
}//结束异常写入
返回;
}
}
但是,服务长时间运行后,应用程序崩溃,出现以下错误:
03-08 00:19:41.570 11239-11253/com.mobiledatabook.com.dialcode
E/AndroidRuntime:致命异常:计时器-0
进程:com.mobiledatabook.com.dialcode,PID:11239
java.lang.OutOfMemoryError:pthread_create(堆栈大小16384字节)
失败:请重试
创建(本机方法)
在java.lang.Thread.start(Thread.java:1029)处
位于com.android.volley.RequestQueue.start(RequestQueue.java:152)
位于com.android.volley.toolbox.volley.newRequestQueue(volley.java:66)
位于com.android.volley.toolbox.volley.newRequestQueue(volley.java:78)
在
com.mobiledatabook.com.dialcode.Myupdates.iDialAutoUpdates(Myupdates.java:128)
在
com.mobiledatabook.com.dialcode.Myupdates$1$1.run(Myupdates.java:74)
在java.util.Timer$TimerImpl.run(Timer.java:284)
错误:java.lang.OutOfMemoryError
有人能帮我改进这段代码以避免a崩溃吗
public class AppController extends Application {
private static AppController sInstance;
private RequestQueue mRequestQueue;
@Override
public void onCreate() {
super.onCreate();
sInstance = this;
}
public static synchronized AppController getInstance() {
return sInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
}
RequestQueue queue=AppController.getInstance().getRequestQueue();