所以我得到了一个应用程序，应该将 2 个位图放在相机预览的顶部。但是，位图会自我复制直到崩溃，因为我切换到表面视图而不是视图以允许相机预览到位。任何人都可以帮忙吗？
CameraActivity.java:
package com.cs461.Ian;
//TODO:Add accelerometer support
//TODO:Add Clickable ghosts
//TODO:Add camera background
/*Completed:(As of 2:30am 4/16)
* Activity launches
* Ghost appears on screen
* Ghost will randomly move around the screen
*/
import java.io.IOException;
import java.util.Random;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class CameraActivity extends Activity{
Bitmap g;
Ghost a;
Ghost still;
SurfaceHolder mSurfaceHolder;
boolean firsttime=true;
int draw_x,draw_y,xSpeed,ySpeed;
static int score=0;
static TextView t;
static Camera bgCamera;
@Override
public boolean dispatchTouchEvent(MotionEvent event){
return false;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.game);
a = new Ghost(getApplicationContext());
still = new Ghost(getApplicationContext());
a.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 120, 120);
still.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 120, 120);
/*a.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
score++;
t.setText("Score: "+score);
Log.w("CLICKED","Clicked on ghost "+score+" times");
}
return true;
}
});
Log.w("Added","Still added ontouchlistener");
still.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
score++;
t.setText("Score: "+score);
Log.w("CLICKED","Clicked on ghost "+score+" times");
}
return true;
}
});*/
setContentView(new Panel(this));
}
class DrawThread extends Thread {
private SurfaceHolder _surfaceHolder;
private Panel _panel;
private boolean _run = false;
public DrawThread(SurfaceHolder surfaceHolder, Panel panel) {
_surfaceHolder = surfaceHolder;
_panel = panel;
}
public void setRunning(boolean run) {
_run = run;
}
@Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
Canvas c;
//stuff that updates ui
while(_run) {
c = null;
try {
c = _surfaceHolder.lockCanvas(null);
synchronized(_surfaceHolder) {
_panel.invalidate();
_panel.onDraw(c);
}
} finally {
if (c != null) {
_surfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
});
}
}
class Panel extends SurfaceView implements SurfaceHolder.Callback {
private DrawThread _thread;
public Panel(Context context) {
super(context);
getHolder().addCallback(this);
_thread = new DrawThread(getHolder(), this);
}
@Override
public void onDraw(Canvas canvas) {
//g.Initalise(BitmapFactory.decodeFile("/res/drawable-hdpi/ghost.png"), 200, 150, 5, 5);;
update(canvas);
invalidate();
}
/*Places ghost on screen and bounces it around in the screen. My phone is apparently only API level 4(the most up to date is 15) so i didn't code it
*for the accelerometer yet.
*/
public void update(Canvas canvas) {
Random rand = new Random();
if(firsttime){
draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ;
draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ;
xSpeed = rand.nextInt(10);
ySpeed = rand.nextInt(10);
still.draw(canvas);
firsttime=false;
}
draw_x+=xSpeed;
draw_y+=ySpeed;
draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ;
draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ;
if (draw_x>this.getWidth()){
draw_x = (this.getWidth()*2)-draw_x;
xSpeed = rand.nextInt(10);
if(xSpeed >=5)
xSpeed=-xSpeed;
}
if (draw_y>this.getHeight()){
draw_y = (this.getHeight()*2)-draw_y;
ySpeed = rand.nextInt(10);
if(ySpeed >=5)
ySpeed=-ySpeed;
}
//g = BitmapFactory.decodeResource(getResources(), R.drawable.ghost);
//canvas.drawBitmap(g, 0, 0, null);
a.update(canvas);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
invalidate();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
_thread.setRunning(true);
_thread.start();
new Cam().execute(getApplicationContext());
//try {
//bgCamera.setPreviewDisplay(getHolder());
//} catch (IOException e) {
// TODO Auto-generated catch block
// e.printStackTrace();
//}
// bgCamera.startPreview();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry = true;
_thread.setRunning(false);
while (retry) {
try {
_thread.join();
invalidate();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
}
}
鬼.java：
package com.cs461.Ian;
import java.util.Random;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
public class Ghost extends View implements View.OnTouchListener{
public Ghost(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
private Bitmap mAnimation;
private int mXPos;
private int mYPos;
private Rect mSRectangle;
private int mSpriteHeight;
private int mSpriteWidth;
View v;
Rect dest;
int score = 0;
/*public Ghost() {
mSRectangle = new Rect(0,0,0,0);
mXPos = 80;
mYPos = 200;
}*/
public void Initalize(Bitmap theBitmap, int Height, int Width) {
mSRectangle = new Rect(0,0,0,0);
mXPos = 80;
mYPos = 200;
mAnimation = theBitmap;
mSpriteHeight = Height;
mSpriteWidth = Width;
mSRectangle.top = 0;
mSRectangle.bottom = mSpriteHeight;
mSRectangle.left = 0;
mSRectangle.right = mSpriteWidth;
dest = new Rect(mXPos, mYPos, mXPos + mSpriteWidth,
mYPos + mSpriteHeight);
}
public void draw(Canvas canvas) {
canvas.drawBitmap(mAnimation, mXPos, mYPos, null);
}
public void update(Canvas canvas) {
new Random();
canvas.translate(1, 1);
mXPos = Math.round(System.currentTimeMillis() % (canvas.getWidth()*2)) ;
mYPos = Math.round(System.currentTimeMillis() % (canvas.getHeight()*2)) ;
if (mXPos>canvas.getWidth())
mXPos = (canvas.getWidth()*2)-mXPos;
if (mYPos>canvas.getHeight())
mYPos = (canvas.getHeight()*2)-mYPos;
draw(canvas);
}
public Rect getRect() {
return mSRectangle;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
score++;
//CameraActivity.t.setText("Score: "+CameraActivity.score);
Log.w("CLICKED","Clicked on ghost "+score+" times");
return true; //doesn't work if returns false either
}
}