在视图中添加布局

时间:2013-04-09 12:34:46

标签: 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。现在我想在此布局中添加布局和一些图像视图。我怎么能这样做? 因为我想在布局中添加一些onTouch和onClick Listeners来移动ImageViews。 另外,我可以添加现有的xml布局还是仅动态创建新的布局?

@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,我承担了这个错误:

  

04-09 13:05:08.842:D / dalvikvm(852):GC_FOR_ALLOC获得50K,4%免​​费   9056K / 9347K,暂停89ms 04-09 13:05:08.892:I / dalvikvm-heap(852):   将堆(frag case)增长到11.503MB,用于2716016字节分配04-09   13:05:09.033:D / dalvikvm(852):GC_CONCURRENT释放<1K,3%免费   11708K / 12039K,暂停9ms + 19ms 04-09 13:05:09.741:   D / AndroidRuntime(852):关闭VM 04-09 13:05:09.751:   W / dalvikvm(852):threadid = 1:线程退出未捕获的异常   (组= 0x409c01f8)04-09 13:05:09.783:E / AndroidRuntime(852):致命   EXCEPTION:主04-09 13:05:09.783:E / AndroidRuntime(852):   java.lang.RuntimeException:无法启动活动   ComponentInfo {com.mitsos.thebasic / com.mitsos.thebasic.main}:   java.lang.IllegalStateException:指定的子节点已经有了   家长。您必须首先在孩子的父母上调用removeView()。 04-09   13:05:09.783:E / AndroidRuntime(852):at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)   04-09 13:05:09.783:E / AndroidRuntime(852):at   android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)   04-09 13:05:09.783:E / AndroidRuntime(852):at   android.app.ActivityThread.access $ 600(ActivityThread.java:123)04-09   13:05:09.783:E / AndroidRuntime(852):at   android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1147)   04-09 13:05:09.783:E / AndroidRuntime(852):at   android.os.Handler.dispatchMessage(Handler.java:99)04-09   13:05:09.783:E / AndroidRuntime(852):at   android.os.Looper.loop(Looper.java:137)04-09 13:05:09.783:   E / AndroidRuntime(852):at   android.app.ActivityThread.main(ActivityThread.java:4424)04-09   13:05:09.783:E / AndroidRuntime(852):at   java.lang.reflect.Method.invokeNative(Native Method)04-09   13:05:09.783:E / AndroidRuntime(852):at   java.lang.reflect.Method.invoke(Method.java:511)04-09 13:05:09.783:   E / AndroidRuntime(852):at   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784)   04-09 13:05:09.783:E / AndroidRuntime(852):at   com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)04-09   13:05:09.783:E / AndroidRuntime(852):at   dalvik.system.NativeStart.main(Native Method)04-09 13:05:09.783:   E / AndroidRuntime(852):引起:java.lang.IllegalStateException:The   指定的孩子已经有父母。您必须调用removeView()   孩子的父母首先。 04-09 13:05:09.783:E / AndroidRuntime(852):     在android.view.ViewGroup.addViewInner(ViewGroup.java:3337)04-09   13:05:09.783:E / AndroidRuntime(852):at   android.view.ViewGroup.addView(ViewGroup.java:3208)04-09   13:05:09.783:E / AndroidRuntime(852):at   android.view.ViewGroup.addView(ViewGroup.java:3188)04-09   13:05:09.783:E / AndroidRuntime(852):at   com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)   04-09 13:05:09.783:E / AndroidRuntime(852):at   com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:260)   04-09 13:05:09.783:E / AndroidRuntime(852):at   android.app.Activity.setContentView(Activity.java:1855)04-09   13:05:09.783:E / AndroidRuntime(852):at   com.mitsos.thebasic.main.onCreate(main.java:53)04-09 13:05:09.783:   E / AndroidRuntime(852):at   android.app.Activity.performCreate(Activity.java:4465)04-09   13:05:09.783:E / AndroidRuntime(852):at   android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)   04-09 13:05:09.783:E / AndroidRuntime(852):at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)   04-09 13:05:09.783:E / AndroidRuntime(852):... 11更多04-09   13:05:21.712:I / Process(852):发送信号。 PID:852 SIG:9

1 个答案:

答案 0 :(得分:0)

试试这种方式

LinearLayout layout = new LinearLayout(this);
ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.your_image);
layout.addView(iv);
layout.addView(view1);
setContentView(layout);

然后你的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);
}

我希望这会奏效。