我想从其中包含线程的活动（实际上它在活动的SurfaceView中）转移到其他活动。但是当我运行它时，它有时会起作用，有时候它没有响应（它移动到其他活动，但活动冻结）。我现在真的很沮丧。我到处搜索，但我找不到问题的答案。有人请帮帮我。 ：（
我会告诉你代码。如果您需要其他代码，我会向您展示。
这是活动代码：
public class MapActivity extends Activity {
private static final String TAG = MapActivity.class.getSimpleName();
private DisplayMetrics metrics;
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
DrawableManager.initInstance(getApplicationContext());
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
Log.d(TAG, "start game activity");
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics); // dapetin
// ukuran
// layar
// mapView =
// new
// MapView(this,
// metrics.widthPixels,
// metrics.heightPixels);
MapView.initInstance(getApplicationContext(), metrics.widthPixels,
metrics.heightPixels);
setContentView(MapView.getInstance());
}
@Override
public void onPause() {
super.onPause();
MapView.getInstance().thread.setRunning(false);
}
}
这是SurfaceView代码（我不会给你所有部分代码，因为它太长了）：
public class MapView extends SurfaceView implements SurfaceHolder.Callback {
public final Random rand;
private Resources res;
private static MapView instance;
private static int screenWidth;
private static int screenHeight;
private static final String TAG = MapView.class.getSimpleName();
public mapThread thread;
private Matrix matrix = new Matrix();
public static Block blockTile[][];
private Player player;
public static int tileSize;
public static boolean isMalam = false;
public static boolean isAdaMonster = false;
private ArrayList<Monster> monsters;
public static int leftMargin;
public static final int nTileH = 10;
public static final int nTileW = 17;
private int ctrMonster = 0;
private int ctrDetik = 0;
private int ctrMenit = 0;
private int ctrJam = 6;
private int ctrHari = 0;
private static boolean isOutdoor;
private Pair<Float, Float> tapPos;
private Pair<Float, Float> tapPos2;
private Context parentActivity;
private boolean isTouch = false;
private boolean Found = false;
private Street street;
private Store store;
private Combinatorium combinatorium;
private Stadium stadium;
private Home home;
private AreaLuar3 arealuar3;
private AreaLuar2 arealuar2;
private AreaLuar1 arealuar1;
private String dataMap[];
public static String currentMap;
public MapView(Context context, int scrWidth, int scrHeight) {
super(context);
parentActivity = context;
blockTile = new Block[nTileW][nTileH];
screenWidth = scrWidth;
screenHeight = scrHeight;
int sTile = scrHeight / nTileH;
tileSize = sTile;
getHolder().addCallback(this);
res = context.getResources();
rand = new Random();
dataMap = new String[15];
currentMap = "street";
player = new Player(7, 4);
build();
setFocusable(true);
}
public void surfaceCreated(SurfaceHolder arg0) {
// inisialisasi thread
initThread();
Log.d(TAG, "surface created");
}
public void surfaceDestroyed(SurfaceHolder arg0) {
releaseThread();
Log.d(TAG, "surface destroyed");
}
public static void initInstance(Context context, int W, int H) {
assert instance == null;
instance = new MapView(context, W, H);
}
public static MapView getInstance() {
assert instance != null;
return instance;
}
// inisialisasi thread
public void initThread() {
if (thread == null || !thread.isAlive()) {
thread = new mapThread(getHolder(), this);
thread.start();
}
thread.setRunning(true);
}
private void releaseThread() {
boolean retry = true;
while (retry)
try {
thread.join();
retry = false;
thread = null;
} catch (InterruptedException e) {
}
}
public void update() {
ctrDetik++;
if (ctrDetik > 59) {
ctrDetik = 0;
ctrMenit++;
if (ctrMenit > 59) {
ctrMenit = 0;
ctrJam++;
cekMalam();
if (ctrJam > 23) {
ctrJam = 0;
ctrHari++;
}
}
}
if (!Found && isAdaMonster) {
ctrMonster++;
for (Monster mons : monsters) {
if (mons.cekEqualBlock(player)) {
Found = true;
Intent test = new Intent(parentActivity, MainMenu.class);
test.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
parentActivity.startActivity(test);
}
if (Found)
break;
if (ctrMonster == 30) {
ctrMonster = 0;
monsters.get(0).moveRandom();
monsters.get(1).moveCloser(player.getXBlock(),
player.getYBlock());
}
}
}
if (isTouch)
if (Math.abs(tapPos2.first - tapPos.first) > 100
|| Math.abs(tapPos2.second - tapPos.second) > 100)
if (Math.abs(tapPos2.first - tapPos.first) > Math
.abs(tapPos2.second - tapPos.second)) {
if (tapPos2.first - tapPos.first > 0)
player.move(2);
else
player.move(4);
} else if (Math.abs(tapPos2.first - tapPos.first) < Math
.abs(tapPos2.second - tapPos.second))
if (tapPos2.second - tapPos.second > 0)
player.move(3);
else
player.move(1);
}
}
这是线程代码：
package com.map;
import android.graphics.Canvas;
import android.view.SurfaceHolder;
public class mapThread extends Thread {
private boolean running;
private SurfaceHolder surfaceHolder;
private MapView mapView;
private final static int MAX_FPS = 60; // fps yang
// diinginkan
private final static int MAX_FRAME_SKIPS = 5; // maksimum
// jumlah
// frame
// yang bisa
// diskip
private final static int FRAME_PERIOD = 1000 / MAX_FPS;
public mapThread(SurfaceHolder surfaceHolder, MapView gameMapView) {
super();
this.surfaceHolder = surfaceHolder;
mapView = gameMapView;
}
public void setRunning(boolean val) {
running = val;
}
@Override
public void run() {
Canvas canvas;
long beginTime; // waktu mulai siklus
long timeDiff; // waktu yang diperlukan satu siklus untuk selesai
int sleepTime; // ms untuk tidur(<0 jika ketinggalan)
int framesSkipped; // jumlah frame yang akan diskip
sleepTime = 0;
while (running) {
canvas = null;
// ngunci canvas untuk digambar
try {
canvas = surfaceHolder.lockCanvas();
synchronized (surfaceHolder) {
beginTime = System.currentTimeMillis();
framesSkipped = 0; // reset jumlah frame yang pengen diskip
// update game state
// draw canvas di panel
mapView.update();
mapView.render(canvas);
// hitung berapa lama satu siklus
timeDiff = System.currentTimeMillis() - beginTime;
// hitung waktu tidur
sleepTime = (int) (FRAME_PERIOD - timeDiff);
if (sleepTime > 0)
// tidurin thread selama waktu tidur tsb
// cycle lebih cepat dari fps
try {
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
}
while (sleepTime < 0 && framesSkipped < MAX_FRAME_SKIPS) {
// ketinggalan fps, update tanpa manggil render
mapView.update();
sleepTime += FRAME_PERIOD;
framesSkipped++;
}
}
} finally {
// in case of an exception the surface is not left in
// an inconsistent state
if (canvas != null)
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
startActivity在SurfaceView代码的update方法中执行。我该怎么办？真的需要帮助。
答案 0 :(得分：0)
SurfaceView扩展了View，因此您可以调用View.post()方法。
在您当前启动的代码中，您要执行此操作。
如果你想要它更清洁一点，你可以调用另一个函数来执行此操作。
post(new Runnable() {
@Override
public void run() {
Intent test = new Intent(parentActivity, MainMenu.class);
test.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
parentActivity.startActivity(test);
});
这将在mainThread上调用startActivity。