Java – the application does not respond after recovery

After recovery, my "game" kept crashing Basically, I start the application and everything is normal Then I press the home button to return to the home screen It's still all normal However, when I open the application backup, it just freezes. About a minute later, I receive an unresponsive message

This is my main activity:

package com.amzoft.android.starraider;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.view.WindowManager;

public class StarRaiderMain extends Activity implements OnTouchListener,OnKeyListener,SensorEventListener{

FastRenderView renderView;
SensorManager sensorManager;
Sensor accelerometer;
Thread mainGameThread;

Player player;

public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
    renderView = new FastRenderView(this);
    renderView.setOnKeyListener(this);
    renderView.setFocusableInTouchMode(true);
    renderView.requestFocus();
    setContentView(renderView);

    sensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
    accelerometer = sensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);

    mainGameThread = new Thread(new mainGameThread());

    player = new Player(this);
}

@Override
protected void onResume()
{
    super.onResume();
    renderView.resume();
    renderView.requestFocus();
    sensorManager.registerListener(this,accelerometer,SensorManager.SENSOR_DELAY_GAME);
}

@Override
protected void onPause()
{
    super.onPause();
    renderView.pause();
    sensorManager.unregisterListener(this);
}

@Override
public void onAccuracyChanged(Sensor sensor,int accuracy) 
{

}

@Override
public void onSensorChanged(SensorEvent event) 
{
    player.onSensorChanged(event);
}

@Override
public boolean onKey(View v,int keyCode,KeyEvent event) 
{
    player.onKey(v,keyCode,event);
    return true;
}

@Override
public boolean onTouch(View v,MotionEvent event) 
{

    return true;
}

class FastRenderView extends SurfaceView implements Runnable
{
    Thread renderThread = null;
    SurfaceHolder holder;
    volatile boolean running = false;

    public FastRenderView(Context context)
    {
        super(context);
        holder = getHolder();
    }

    public void resume()
    {
        running = true;
        renderThread = new Thread(this);
        renderThread.start();
    }

    public void pause()
    {
        running = false;
        while(true)
        {
            try{
                renderThread.join();
            }catch(InterruptedException e){
                Log.d("StarRaider",e.getMessage());
            }
        }
    }

    @Override
    public void run()
    {
        while(running)
        {
            if(!holder.getSurface().isValid())
                continue;
            Canvas canvas = holder.lockCanvas();
            onDraw(canvas);
            holder.unlockCanvasAndPost(canvas);
        }
    }

    public void onDraw(Canvas canvas)
    {
        canvas.drawRGB(255,255,255);
        player.onDraw(canvas);
    }
}
class mainGameThread extends Thread
{
    mainGameThread()
    {
        super("mainGameThread");
        start();
    }
    public void run()
    {
        try{
            player.onUpdate();
        }catch(Exception e){

        }
        }
    }
}

Any help would be appreciated

This is my logcat output: http://pastebin.com/3b09YAkP I have a major game thread because I read that if the rendering thread gets stuck for 2 seconds, it will crash

Solution

It seems that it may be one of two things

You should probably explicitly pause your thread in onpause() If it tries to resume without pausing, it may cause application deadlock

You should also view the Google I / O presentation on replica island About an hour Write down his part about garbage collection This may be happening and cause your application to crash due to an anr error

I hope it helps!