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在我的第一個Android應用程序中，我的線程出現問題。事實上，當我觸摸屏幕時，我希望它可以像我想要的那樣發射許多恆星（投射物）。但目前，一觸之後，我有一條消息告訴我，該應用程序'沒有響應...使用線程在Android中移動多個位圖
我沒有找到解決方案。
這裏是我的代碼：（注：也有法國的意見，只是忽略它）
package com.example.slider;
import java.util.Stack;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
public class TirMissile extends Activity implements OnTouchListener {
BringBackSurface aBackSurface;
float x, y, sX, sY, fX, fY; // s=Starting f=Final
int i;
Bitmap test, test1;
ThreadProjectile aTP;
Stack<Projectile> aProjectileAttente;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
aBackSurface = new BringBackSurface(this);
aBackSurface.setOnTouchListener(this);
x = 0; y = 0; sX = 0; sY = 0; fX = 0; fY = 0;
i=0;
test = BitmapFactory.decodeResource(getResources(), android.R.drawable.btn_star_big_on);
test1 = BitmapFactory.decodeResource(getResources(), android.R.drawable.btn_star_big_off);
//full screen
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(aBackSurface);
Log.d("TEST","test01");
}
@Override
protected void onPause() {
super.onPause();
aBackSurface.pause();
}
@Override
protected void onResume() {
super.onResume();
aBackSurface.resume();
Log.d("TEST","test0");
aBackSurface.getHolder().addCallback(new MyCallback());
}
@Override
public boolean onTouch(View v, MotionEvent event) { // event = down/up/right/release/value/etc...
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
x = event.getX();
y = event.getY();
switch(event.getAction()) {
case MotionEvent.ACTION_UP:
fX = event.getX();
fY = event.getY();
Projectile vProjectile = new Projectile(50,50,fX,fY,50,test);
if(i==0){
this.aProjectileAttente = new Stack<Projectile>();
}
this.aProjectileAttente.push(vProjectile);
if(i==0){
this.aTP.setStack(this.aProjectileAttente);
aBackSurface.resume();
aTP.run();
i++;
}
Log.d("TEST","test10");
}
return true; // si true, x et y seront constament mesurés tant qu'on maintient le doight sur l'écran
}
public class MyCallback implements SurfaceHolder.Callback {
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height){
Canvas canvas= holder.lockCanvas();
canvas.drawRGB(02, 02, 150);
holder.unlockCanvasAndPost(canvas);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Canvas canvas= holder.lockCanvas();
canvas.drawRGB(02, 02, 150);
holder.unlockCanvasAndPost(canvas);
aTP = new ThreadProjectile(aBackSurface);
Log.d("TEST","test110");
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}
}
第二類：
package com.example.slider;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Stack;
import android.graphics.Canvas;
import android.util.Log;
import com.example.slider.BringBackSurface;
public class ThreadProjectile implements Runnable{
private ArrayList<Projectile> aALprojectile;
private BringBackSurface aBBS;
private Stack<Projectile> aProjectileAttente;
public ThreadProjectile(final BringBackSurface BBS) {
this.aBBS = BBS;
this.aALprojectile = new ArrayList<Projectile>();
Log.d("TEST","test2");
}
public void setStack(Stack<Projectile> stack){
this.aProjectileAttente = stack;
}
private void updateProjectile() {
Log.d("UPDATE", "update en cours");
while(!this.aProjectileAttente.isEmpty())
aALprojectile.add(this.aProjectileAttente.pop());
}
@Override
public void run() {
Projectile vProjectile;
float nX, nY;
Canvas canvas = null;
Iterator<Projectile> vIt;
while(aBBS.getRunning()) {
updateProjectile();
vIt = aALprojectile.iterator();
if(!this.aBBS.getHolder().getSurface().isValid()) continue; // si ce n'est pas valide, on continue (continue fonctionne comme un statut break et nous)
canvas= this.aBBS.getHolder().lockCanvas();
if(canvas == null) Log.e("CANVAS", "Pas de Canvas");
canvas.drawRGB(02, 02, 150); // coloriage du background
Log.d("BACKGROUND","test205");
while(vIt.hasNext()) {
vProjectile = vIt.next();
nX = vProjectile.getX() + vProjectile.getVX();
nY = vProjectile.getY() + vProjectile.getVY();
if(nX < 0 || nY < 0 || nX > aBBS.getWidth() || nY > aBBS.getHeight()) vIt.remove();
else{
canvas.drawBitmap(vProjectile.getBitmap(), nX-(vProjectile.getBitmap().getWidth()/2) , nY-(vProjectile.getBitmap().getHeight()/2), null);
vProjectile.setX(nX);
vProjectile.setY(nY);
}
Log.d("TEST","X:"+nX+" Y:"+nY);
}
Log.d("TEST","test207");
this.aBBS.getHolder().unlockCanvasAndPost(canvas);
}
}
}
末級使用：
package com.example.slider;
import android.content.Context;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class BringBackSurface extends SurfaceView { // Cette classe dans cette classe pour avoir accès aux valeurs de X et Y (XML?) dans la méthode onTouch()
public SurfaceHolder aHolder;
public boolean aIsRunning = false; // notre thread va aller dans le onresume() donc va passer en true
public BringBackSurface(Context context) {
super(context);
}
public void pause(){
aIsRunning = false;
}
public void resume(){
aHolder = getHolder();
aIsRunning = true;
}
public boolean getRunning() {
return aIsRunning;
}
}
謝謝。
'aTP.run（）;'這不是你如何開始一個線程。 – njzk2
（你想'新線程（aTP）.start（）'） – njzk2