Android动态壁纸缩放
[英]Android live wallpaper scaling
问题描述
I'm learning android and java and am trying to learn how to make a live wallpaper I am using the aquarium tutorial, I put it all in one file instead of spreading it but what I am trying to do is get one scale number for everything, I want to get the height of the screen divide that by the background image height (which will always be bigger), this should give me a ratio to use for scaling everything, I tried this in a surfaceView code and it worked perfect, I tried it in livewallpaper and nada. 
我正在学习android和java，正在尝试学习如何制作动态壁纸，我正在使用水族馆教程，我将其全部放在一个文件中而不是传播出去，但是我想做的是为所有事情获得一个标度数字，我想得到屏幕的高度除以背景图像的高度（它将始终更大），这应该给我一个用于缩放所有内容的比率，我在surfaceView代码中尝试了一下，并且效果很好，我在livewallpaper和nada中尝试过。 In the surfaceView test I use onSizeChange and got the height that way and it worked no problems. 在surfaceView测试中，我使用onSizeChange并以这种方式获得了高度，并且没有任何问题。 This is what I did for the livewallpaper one This is what I put for the onSurfaceChange 这是我为livewallpaper做的事情这是我为onSurfaceChange做的事情
public int screenWidth;
public float rescaler;
public float totalHeight = theTemplate._backgroundImage.getHeight();
@Override
public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
//add rescale and width
screenWidth = width;
rescaler = (float) (height / totalHeight);
super.onSurfaceChanged(holder, format, width, height);
}
The background image comes from an inner class named TheTemplate This is what I did there The variables 背景图像来自一个名为TheTemplate的内部类。这就是我在那里所做的。
private SpriteAnimationActivityEngine theTest;
private Bitmap theBackgroundImage;
private float theScaler = theTest.rescaler;
then I try and rescale it using theScaler 然后我尝试使用Scaler重新缩放
public void initialize(Context context, SurfaceHolder surfaceHolder) {
this.spriteThread = new SpriteThread(this);
this._surfaceHolder = surfaceHolder;
this._sprites = new ArrayList<Renderable>();
this._context = context;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
this._backgroundImage = BitmapFactory.decodeResource(context.getResources(),ca.samsstuff.testonepagewallpaper.R.drawable.sky, options);
this.theBackgroundImage = Bitmap.createScaledBitmap(_backgroundImage, (int) (theScaler * _backgroundImage.getWidth()), (int) (theScaler * _backgroundImage.getHeight()), true);
this.addSprites();
}
Then it passes it to draw the background 然后将其传递以绘制背景
private void renderBackGround(Canvas canvas) {
canvas.drawBitmap(this.theBackgroundImage, 0, 0, null);
}
Which sends it to draw 哪个发送它画
protected void onDraw(Canvas canvas) {
this.renderBackGround(canvas);
for (Renderable renderable : this._sprites) {
renderable.render(canvas);
}
}
I keep getting errors and don't know what I am doing wrong. 我不断收到错误，也不知道我在做什么错。 Like I said I am learning both android and java but this method worked in another test I did but I got the screen height from onSizeChange can I get the height by using onSurfaceChange? 就像我说的那样，我正在学习android和java，但是此方法在我做过的另一项测试中有效，但是我从onSizeChange获得了屏幕高度，可以通过使用onSurfaceChange获得高度吗？
Any help would be appreciated Thanks in advance sam 任何帮助将不胜感激提前感谢山姆
EDIT I also tried to rescale within the theTemplate class just to see if it would work having everything within its own class and still having issues, I used the DisplayMetrics to get the screen height this time. 编辑我也尝试在TheTemplate类中重新缩放，只是为了查看它是否具有其自身类中的所有内容并且仍然有问题，我这次使用DisplayMetrics来获取屏幕高度。 This might work if I can get it going properly. 如果我可以正常进行，这可能会起作用。 Here is this attempt 这是尝试
public class TheTemplate {
private SpriteThread spriteThread;
private SurfaceHolder _surfaceHolder;
private ArrayList<Renderable> _sprites;
public Bitmap _backgroundImage = BitmapFactory.decodeResource(getResources(), R.drawable.sky);;
private Context _context;
// add rescale stuff
private Bitmap theBackgroundImage;
private float theScaler = initFrameParams() / _backgroundImage.getHeight();
private Bitmap oneBackImage = Bitmap.createScaledBitmap(_backgroundImage, (int) (theScaler * _backgroundImage.getWidth()), (int) (theScaler * _backgroundImage.getHeight()), true);
int initFrameParams()
{
//get the screen height to use to rescale everything
DisplayMetrics metrics = new DisplayMetrics();
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
display.getMetrics(metrics);
int screenHeight = display.getHeight();
return screenHeight;
}
public void render(){
Canvas canvas = null;
try{
canvas = this._surfaceHolder.lockCanvas(null);
synchronized (this._surfaceHolder) {
this.onDraw(canvas);
}
}finally{
if(canvas != null){
this._surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
protected void onDraw(Canvas canvas) {
this.renderBackGround(canvas);
for (Renderable renderable : this._sprites) {
renderable.render(canvas);
}
};
public void start(){
this.spriteThread.switchOn();
}
public void stop(){
boolean retry = true;
this.spriteThread.switchOff();
while (retry) {
try {
this.spriteThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
public int getLeft() {
return 0;
}
public int getRight() {
return this.theBackgroundImage.getWidth();
}
public void initialize(Context context, SurfaceHolder surfaceHolder) {
this.spriteThread = new SpriteThread(this);
this._surfaceHolder = surfaceHolder;
this._sprites = new ArrayList<Renderable>();
this._context = context;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
this.theBackgroundImage = oneBackImage;
this.addSprites();
}
private void addSprites() {
Point startPoint = new Point(100, 100);
this._sprites.add(new SpriteOne(this._context, this, startPoint, 90));
Point startPoint1 = new Point(100, 300);
this._sprites.add(new SpriteOne(this._context, this, startPoint1, 50));
Point startPoint2 = new Point(200, 200);
this._sprites.add(new SpriteOne(this._context, this, startPoint2, 15));
}
private void renderBackGround(Canvas canvas)
{
canvas.drawBitmap(this.theBackgroundImage, 0, 0, null);
}
}
As I stated before any help would be appreciated. 正如我之前所说，任何帮助将不胜感激。 Thanks again in advance Sam 预先再次感谢Sam
Edit SOLVED Here is an answer I came up with, The rescale code is where the comments are Hope this helps someone out. 编辑已解决这是我想出的一个答案，重新缩放代码是注释所在，希望这可以帮助某人。
public class TheTemplate {
private SpriteThread spriteThread;
private SurfaceHolder _surfaceHolder;
private ArrayList<Renderable> _sprites;
public Bitmap _backgroundImage = BitmapFactory.decodeResource(getResources(), R.drawable.sky);;
private Context _context;
// add rescale stuff
//private SpriteAnimationActivityEngine theTest;
private Bitmap theBackgroundImage;
private float totalHeight = _backgroundImage.getHeight();
private int screenSized = initFrameParams();
private float theScaler = (float) (screenSized / totalHeight);
private Bitmap oneBackImage = Bitmap.createScaledBitmap(_backgroundImage, (int) (theScaler * _backgroundImage.getWidth()), (int) (theScaler * _backgroundImage.getHeight()), true);
int initFrameParams()
{
DisplayMetrics metrics = new DisplayMetrics();
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
display.getMetrics(metrics);
int screenHeight = display.getHeight();
return screenHeight;
}
public void render(){
Canvas canvas = null;
try{
canvas = this._surfaceHolder.lockCanvas(null);
synchronized (this._surfaceHolder) {
this.onDraw(canvas);
}
}finally{
if(canvas != null){
this._surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
protected void onDraw(Canvas canvas) {
this.renderBackGround(canvas);
for (Renderable renderable : this._sprites) {
renderable.render(canvas);
}
};
public void start(){
this.spriteThread.switchOn();
}
public void stop(){
boolean retry = true;
this.spriteThread.switchOff();
while (retry) {
try {
this.spriteThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
public int getLeft() {
return 0;
}
public int getRight() {
return this.theBackgroundImage.getWidth();
}
public void initialize(Context context, SurfaceHolder surfaceHolder) {
this.spriteThread = new SpriteThread(this);
this._surfaceHolder = surfaceHolder;
this._sprites = new ArrayList<Renderable>();
this._context = context;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
this.theBackgroundImage = oneBackImage;
this.addSprites();
}
private void addSprites() {
Point startPoint = new Point(100, 100);
this._sprites.add(new SpriteOne(this._context, this, startPoint, 90));
Point startPoint1 = new Point(100, 300);
this._sprites.add(new SpriteOne(this._context, this, startPoint1, 50));
Point startPoint2 = new Point(200, 200);
this._sprites.add(new SpriteOne(this._context, this, startPoint2, 15));
}
private void renderBackGround(Canvas canvas)
{
canvas.drawBitmap(this.theBackgroundImage, 0, 0, null);
}
}
1 个解决方案
解决方案1
1 已采纳 2011-08-04 02:15:15
I added the answer to the original post, hope this helps someone. 我在原始帖子中添加了答案，希望对您有所帮助。 Sam Sorry about that folks, new to this method of using a forum Here is the answer, I added comments in the code where I made the changes for scaling images. Sam Sorry，关于人员，这是使用论坛这种方法的新手。这是答案，我在代码中添加了注释，在其中对缩放图像进行了更改。 This method can also be used for positioning also. 该方法也可以用于定位。 Here is the answer. 这是答案。
public class TheTemplate {
private SpriteThread spriteThread;
private SurfaceHolder _surfaceHolder;
private ArrayList<Renderable> _sprites;
public Bitmap _backgroundImage = BitmapFactory.decodeResource(getResources(), R.drawable.sky);;
private Context _context;
// add rescale stuff
//private SpriteAnimationActivityEngine theTest;
private Bitmap theBackgroundImage;
private float totalHeight = _backgroundImage.getHeight();
private int screenSized = initFrameParams();
private float theScaler = (float) (screenSized / totalHeight);
private Bitmap oneBackImage = Bitmap.createScaledBitmap(_backgroundImage, (int) (theScaler * _backgroundImage.getWidth()), (int) (theScaler * _backgroundImage.getHeight()), true);
int initFrameParams()
{
DisplayMetrics metrics = new DisplayMetrics();
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
display.getMetrics(metrics);
int screenHeight = display.getHeight();
return screenHeight;
}
public void render(){
Canvas canvas = null;
try{
canvas = this._surfaceHolder.lockCanvas(null);
synchronized (this._surfaceHolder) {
this.onDraw(canvas);
}
}finally{
if(canvas != null){
this._surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
protected void onDraw(Canvas canvas) {
this.renderBackGround(canvas);
for (Renderable renderable : this._sprites) {
renderable.render(canvas);
}
};
public void start(){
this.spriteThread.switchOn();
}
public void stop(){
boolean retry = true;
this.spriteThread.switchOff();
while (retry) {
try {
this.spriteThread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
public int getLeft() {
return 0;
}
public int getRight() {
return this.theBackgroundImage.getWidth();
}
public void initialize(Context context, SurfaceHolder surfaceHolder) {
this.spriteThread = new SpriteThread(this);
this._surfaceHolder = surfaceHolder;
this._sprites = new ArrayList<Renderable>();
this._context = context;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
this.theBackgroundImage = oneBackImage;
this.addSprites();
}
private void addSprites() {
Point startPoint = new Point(100, 100);
this._sprites.add(new SpriteOne(this._context, this, startPoint, 90));
Point startPoint1 = new Point(100, 300);
this._sprites.add(new SpriteOne(this._context, this, startPoint1, 50));
Point startPoint2 = new Point(200, 200);
this._sprites.add(new SpriteOne(this._context, this, startPoint2, 15));
}
private void renderBackGround(Canvas canvas)
{
canvas.drawBitmap(this.theBackgroundImage, 0, 0, null);
}
}
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