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我在绘制应用程序,其中已经有一个按钮。但我想添加另一个按钮。当我这样做时,它会覆盖上一个按钮。在Android中以编程方式在布局中添加更多视图
我有点新LayoutParams,所以我需要你的指导在这里。请你检查我的工作代码:
public class MyTouchEventView extends View {
private Paint paint = new Paint();
private Path path = new Path();
private Paint circlePaint = new Paint();
private Path circlePath = new Path();
public Button btnReset;
public Button btnSave;
public LayoutParams params;
public LayoutParams params2;
@SuppressWarnings("deprecation")
public MyTouchEventView(Context context) {
super(context);
paint.setAntiAlias(true);
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeWidth(15f);
circlePaint.setAntiAlias(true);
circlePaint.setColor(Color.BLUE);
circlePaint.setStyle(Paint.Style.STROKE);
circlePaint.setStrokeJoin(Paint.Join.MITER);
circlePaint.setStrokeWidth(4f);
btnReset = new Button(context);
btnReset.setText("Clear Screen");
btnSave = new Button(context);
btnSave.setText("Save Image");
params = new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
params2 = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
btnReset.setLayoutParams(params);
btnSave.setLayoutParams(params);
btnSave.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// resets the screen
path.reset();
// Calls the onDraw() method
postInvalidate();
}
});
btnReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// resets the screen
path.reset();
// Calls the onDraw() method
postInvalidate();
}
});
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawPath(path, paint);
canvas.drawPath(circlePath, circlePaint);
}
我的MainActivity:
public class DrawingBrush extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyTouchEventView tv = new MyTouchEventView(this);
setContentView(tv);
addContentView(tv.btnReset, tv.params);
addContentView(tv.btnSave, tv.params);
}
家伙你能帮我找出我错过这里?提前致谢。
嗨我试过这个,但仍然重叠第一个按钮 – 2013-05-01 17:17:20
如果你不想让它们重叠,那么你可以使用LinearLayout。首先添加您的自定义视图,然后添加按钮。有关布局的更多信息:http://developer.android.com/guide/topics/ui/declaring-layout.html – SimonSays 2013-05-01 17:33:16
嗨simosays,我将它更改为LinearLayout,它不再重叠,但现在的问题是我不能在画布上画画。怎么了? – 2013-05-03 13:58:03