Android 在视图中添加布局
我有这个代码,所以我可以用手指画一个特定的图像。现在我想在这个布局中添加一个布局和一些ImageView。我怎么能做到? 因为我想在布局中添加一些onTouch和onClick侦听器来移动ImageView。 另外,我可以添加现有的xml布局,还是只动态创建新的布局Android 在视图中添加布局,android,layout,android-canvas,Android,Layout,Android Canvas,我有这个代码,所以我可以用手指画一个特定的图像。现在我想在这个布局中添加一个布局和一些ImageView。我怎么能做到? 因为我想在布局中添加一些onTouch和onClick侦听器来移动ImageView。 另外,我可以添加现有的xml布局,还是只动态创建新的布局 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); MyView view1
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyView view1 =new MyView(this);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
setContentView(view1);
}
public class MyView extends View {
private static final float MINP = 0.25f;
private static final float MAXP = 0.75f;
private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
public MyView(Context c) {
super(c);
setBackgroundResource(R.drawable.half_court);
// this.inflate(c, R.drawable.playera1, null);
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
// canvas.drawLine(mX, mY, Mx1, My1, mPaint);
// canvas.drawLine(mX, mY, x, y, mPaint);
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y) {
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
// mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up() {
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
// Mx1=(int) event.getX();
// My1= (int) event.getY();
invalidate();
break;
}
return true;
}
}
(编辑)当我尝试Gunaseelan的解决方案时,我犯了以下错误:
4-09 13:05:08.842:D/dalvikvm(852):释放50K,4%自由
9056K/9347K,暂停89ms 04-09 13:05:08.892:I/dalvikvm堆(852):
将2716016字节分配04-09的堆(frag大小写)增加到11.503MB
13:05:09.033:D/dalvikvm(852):GC_试试这个方法
LinearLayout layout = new LinearLayout(this);
ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.your_image);
layout.addView(iv);
layout.addView(view1);
setContentView(layout);
那么您的onCreate()
应该是
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyView view1 =new MyView(this);
LinearLayout layout = new LinearLayout(this);
ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.your_image);
layout.addView(iv);
layout.addView(view1);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
setContentView(layout);
}
我希望这能起作用。不幸的是,当我这样做时,我的程序因错误而关闭。而且从不跑步。你想上传我的错误吗?我现在尝试了,我把它们放在Myview的contsructor的最后一行,但是同样的错误出现了!我再次上传我的错误,我想是的。但是这家伙有一行setContentView(R.layout.activity_main);但是我使用setContentView(view1);我认为有问题,但没有这条线,我就画不出来,没有这条线,你可以照常画。扩展线性布局并向其中添加视图。你想做的所有事情都可以在标准的android布局中实现。