我刚将我的应用程序上传到谷歌播放，然后将其安装在运行Android 2.3.5的Android手机上。无论如何，在模拟器上一切都运行良好，但在真实设备上启动时崩溃。有任何想法吗？这是代码。
public class StopWatch extends Activity implements OnClickListener {
//PROPERTIES USED THROUGHOUT CLASS
private Random rand = new Random();
private TextView stopWatchC;
private Button startButton,stopButton,resetButton;
private RelativeLayout mainLayout;
private Handler handle;
private Handler backHand = new Handler();
private boolean timerIsRunning;
private boolean previouslyStarted;
private long startTime;
private long endTime;
private long runTime;
private long UPDATE_EVERY = 200;
private int backgrounds[] = {
R.drawable.woman_1,
R.drawable.woman_2,
R.drawable.woman_3,
R.drawable.woman_4,
R.drawable.woman_5,
R.drawable.woman_6,
R.drawable.woman_7,
R.drawable.woman_8,
R.drawable.woman_9
};
//END PROPERTY DECLARATIONS
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stopwatch);
//Start our service
startService(new Intent(this,StopwatchService.class));
//SETUP BUTTON AND TEXTVIEWS
stopWatchC = (TextView) findViewById(R.id.counter);
startButton = (Button) findViewById(R.id.start_button);
stopButton = (Button) findViewById(R.id.stop_button);
resetButton = (Button) findViewById(R.id.reset);
mainLayout = (RelativeLayout) findViewById(R.id.main_layout);
//Handles listening for clicks on our start,stop and reset buttons
startButton.setOnClickListener(this);
stopButton.setOnClickListener(this);
resetButton.setOnClickListener(this);
//Calls run method for changing backgrounds
backHand.postDelayed(backgroundUpdate, 300);
}
/**
* Handles displaying the counter
*/
public void SWCounterDisplay()
{
String display;
long now;
long difference;
long secs;
long mins;
long hours;
if(timerIsRunning == true)
{
now = System.currentTimeMillis();
}else{
now = endTime;
}
if(previouslyStarted == true){
difference = runTime + (now - startTime);
}else{
difference = now-startTime;
}
//No negative numbers
if(difference < 0)
{
difference = 0;
}
secs = difference/1000;
mins = secs/60;
hours = mins/60;
secs = secs%60;
mins = mins%60;
display = String.format("%d", hours) + ":" +
String.format("%02d",mins) + ":" +
String.format("%02d", secs);
stopWatchC.setText(display);
}
/**
* Reset the timer
*/
public void resetTimer()
{
timerIsRunning = false;
previouslyStarted = false;
stopButton.setEnabled(false);
startButton.setEnabled(true);
runTime = 0;
SWCounterDisplay();
handle.removeCallbacks(timerUpdate);
handle = null;
}
/**
* Starts the stop watch
*/
public void startTimer()
{
timerIsRunning = true;
stopButton.setEnabled(timerIsRunning);
startButton.setEnabled(false);
if(!previouslyStarted){
previouslyStarted = true;
runTime = 0;
}
startTime = System.currentTimeMillis();
//Create new handler
handle = new Handler();
handle.postDelayed(timerUpdate, UPDATE_EVERY);
}
/**
* Stops the timer
*/
public void stopTimer()
{
timerIsRunning = false;
stopButton.setEnabled(timerIsRunning);
startButton.setEnabled(true);
endTime = System.currentTimeMillis();
runTime += endTime-startTime;
handle.removeCallbacks(timerUpdate);
handle = null;
}
/**
* Handles any onClick events
*/
@Override
public void onClick(View v) {
if(v == startButton)
{
startTimer();
}else if(v == stopButton)
{
stopTimer();
}else if(v == resetButton)
{
resetTimer();
}
}
/**
* Changes the background every 20 Seconds
*/
private Runnable backgroundUpdate = new Runnable(){
@Override
public void run() {
mainLayout.setBackgroundResource(backgrounds[rand.nextInt(backgrounds.length)]);
backHand.postDelayed(this, 60000);
}
};
/**
* Handles updating the timer
*/
private Runnable timerUpdate = new Runnable(){
@Override
public void run() {
SWCounterDisplay();
if(handle != null){
handle.postDelayed(this, UPDATE_EVERY);
}
}
};
/**
* Call run method if timer is still running
*/
public void onStart()
{
super.onStart();
if(timerIsRunning == true)
{
handle = new Handler();
handle.postDelayed(timerUpdate, UPDATE_EVERY);
}
}
/**
* Stop the timer if timer is still running
*/
public void onStop()
{
super.onStop();
if(timerIsRunning == true)
{
handle.removeCallbacks(timerUpdate);
handle = null;
}
}
/**
* Resume when the onResume method is called
*/
public void onResume()
{
super.onResume();
if(timerIsRunning == true){
stopButton.setEnabled(true);
startButton.setEnabled(false);
}else{
stopButton.setEnabled(false);
startButton.setEnabled(true);
}
SWCounterDisplay();
}
package com.webdeveloper93.stopwatch;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
public class StopwatchService extends Service {
@Override
public IBinder onBind(Intent arg0) {
return null;
}
public int onStartCommand(Intent intent,int flags,int startId)
{
Log.d("StopwatchService:","SERVICE STARTED");
super.onStartCommand(intent, flags, startId);
return START_NOT_STICKY;
}
public void onDestroy()
{
Log.d("StopwatchService:","SERVICE DESTROYED");
super.onDestroy();
}
}
提前致谢
修改
I/ActivityManager( 132): No longer want com.google.android.gsf.login (pid 1140): hidden #16
D/WifiService( 132): ACTION_BATTERY_CHANGED pluggedType: 0
I/ActivityManager( 132): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.webdeveloper93.stopwatch/.StopWatch } from pid 231
E/AndroidRuntime( 1186): FATAL EXCEPTION: main
E/AndroidRuntime( 1186): java.lang.NoSuchMethodError: android.os.StrictMode$VmPolicy$Builder.detectLeakedClosableObjects
E/AndroidRuntime( 1186): at com.webdeveloper93.stopwatch.StopWatch.onCreate(StopWatch.java:59)
E/AndroidRuntime( 1186): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime( 1186): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
E/AndroidRuntime( 1186): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
E/AndroidRuntime( 1186): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
E/AndroidRuntime( 1186): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
E/AndroidRuntime( 1186): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1186): at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 1186): at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 1186): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1186): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 1186): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
E/AndroidRuntime( 1186): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
E/AndroidRuntime( 1186): at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 132): Force finishing activity com.webdeveloper93.stopwatch/.StopWatch
W/ActivityManager( 132): Activity pause timeout for HistoryRecord{408ff850 com.webdeveloper93.stopwatch/.StopWatch}
W/InputMethodManagerService( 132): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@405ca178
I/ActivityManager( 132): Process com.webdeveloper93.stopwatch (pid 1186) has died.
W/ActivityManager( 132): Service crashed 2 times, stopping: ServiceRecord{4078c080 com.webdeveloper93.stopwatch/.StopwatchService}
W/ActivityManager( 132): Activity destroy timeout for HistoryRecord{408ff850 com.webdeveloper93.stopwatch/.StopWatch}
I/ActivityManager( 132): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=org.jtb.alogcat/.LogActivity } from pid 231
答案 0 :(得分：0)
看起来你使用的方法没有在android＆lt; = 2.3.5中实现。如果您删除@SuppressLint("NewApi")，则会看到它是哪一个。
我认为它适用于您的模拟器，因为您在那里使用了更高版本的sdk版本。