下面是textview的onTouchEvent事件的代码：
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (up_text != null) {
up_text.setTextColor(Color.BLACK);
} else {
TextView text = (TextView) context
.findViewById(R.id.head_lines);
text.setTextColor(Color.BLACK);
}
translateImage(event);
TextView tv = (TextView) v;
tv.setTextColor(Color.WHITE);
up_text = tv;
}
return true;
}
在这段代码中我主要是实现了textview的字体颜色的变还，大家应该看得懂，没什么好说的吧。
最后就是实现HorizontalScrollView控件通过单机左右的imageButton来实现左右移动，这个就是在ImageButton的OnClick事件中来调用HorizontalScrollView的smoothScrollTo(x,y)方法这里面是传入新的坐标。下面是实现代码：
private void addListener() {
column_to_left.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
column_scrollview.smoothScrollTo(
column_scrollview.getScrollX() - 40, 0);
}
});
column_to_right.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
column_scrollview.smoothScrollTo(
column_scrollview.getScrollX() + 40, 0);
}
});
}
下面是动态添加textview的代码：
private void initView() {
column_title_layout = (LinearLayout) findViewById(R.id.column_title_layout);
column_scrollview = (HorizontalScrollView) findViewById(R.id.column_scrollview);
column_slide_bar = (ImageView) findViewById(R.id.column_slide_bar);
column_to_left = (ImageButton) findViewById(R.id.column_to_left);
column_to_right = (ImageButton) findViewById(R.id.column_to_right);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(65,
LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL;
params.leftMargin = 9;
TextViewOnTouchListener listener = new TextViewOnTouchListener(
column_slide_bar, this);
TextView text = null;
for (int i = 0; i < 6; i++) {
text = new TextView(this);
text.setTextSize(16);
switch (i) {
case 0:
text.setId(R.id.head_lines);
text.setTextColor(Color.WHITE);
text.setText("头条");
break;
case 1:
text.setId(R.id.sport);
text.setTextColor(Color.BLACK);
text.setText("体育");
break;
case 2:
text.setId(R.id.entertainment);
text.setTextColor(Color.BLACK);
text.setText("娱乐");
break;
case 3:
text.setId(R.id.finance);
text.setTextColor(Color.BLACK);
text.setText("财经");
break;
case 4:
text.setId(R.id.technology);
text.setTextColor(Color.BLACK);
text.setText("科技");
break;
case 5:
text.setId(R.id.more);
text.setTextColor(Color.BLACK);
text.setText("更多");
break;
}
text.setOnTouchListener(listener);
column_title_layout.addView(text, params);
}
}
