我想在按钮旁边添加一个小计数器,以显示某些项目的剩余数量,例如,剩余未使用的提示数量。目标布局如下所示:
我研究了网络,发现有人说要为每个数量使用不同的图片。然而,如果数量可以达到100,怎么能解决?真的有必要画这个吗?
我想在RelativeLayout
中将2个按钮粘在一起,这样当用户按下底部按钮时,顶部按钮会向上和向下计数,setText
本身,但有更好的解决方案还是进口?
感谢Rupesh提供您的代码和建议!我已经实现如下。但是你知道如何将红色圆圈textview进一步向右移动吗?并且20也无法在红圈中正确显示......
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp" >
<Button
android:id="@+id/button_tip"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginBottom="1dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="2dp"
android:layout_marginTop="5dp"
android:background="@drawable/orange_btn"
android:onClick="button_tip_click"
android:text="Hello" />
<TextView
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_gravity="top|right"
android:background="@drawable/red_circle_btn"
android:gravity="center"
android:text="20"
android:textColor="@color/white"
android:textSize="8sp"
android:textStyle="bold" />
</FrameLayout>
答案 0 :(得分:4)
设置Button的背景Drawable到这样的自定义Drawable:
public class DecoratedTextViewDrawable extends LayerDrawable {
private int mCnt = 0;
private Paint mPaint;
private TextView mParent;
private ColorStateList mColors;
private Rect mBounds;
public DecoratedTextViewDrawable(TextView tv, Drawable[] layers, int cnt) {
super(layers);
mParent = tv;
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setTextAlign(Align.CENTER);
mPaint.setTextSize(tv.getTextSize());
mPaint.setTypeface(Typeface.DEFAULT_BOLD);
int[][] states = {
{android.R.attr.state_pressed}, {android.R.attr.state_focused}, {}
};
int[] colors = {
0xff0000aa, 0xff880000, 0xff00aa00
};
mColors = new ColorStateList(states, colors);
mBounds = new Rect();
setCnt(cnt);
}
public void setCnt(int cnt) {
mCnt = cnt;
String s = Integer.toString(cnt);
mPaint.getTextBounds(s, 0, s.length(), mBounds);
invalidateSelf();
}
@Override
protected boolean onStateChange(int[] state) {
invalidateSelf();
return super.onStateChange(state);
}
@Override
public boolean isStateful() {
return true;
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
float x = mPaint.getTextSize() * 1.5f;
float r = mPaint.getTextSize() * 0.9f;
int base = mParent.getBaseline();
int[] stateSet = getState();
// Log.d(TAG, "draw " + StateSet.dump(stateSet));
int color = mColors.getColorForState(stateSet, 0xff000000);
mPaint.setColor(color);
canvas.drawCircle(x, base + mBounds.top + mBounds.height() / 2, r, mPaint);
mPaint.setColor(0xffeeeeee);
canvas.drawText(Integer.toString(mCnt), x, base, mPaint);
}
}
你可以像这样使用它:
// Activity.onCreate method
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
int NUM = 5;
final int[] cnt = new int[NUM];
Random r = new Random();
for (int i = 0; i < NUM; i++) {
cnt[i] = r.nextInt(20);
Button b = new Button(this);
b.setText("Click me");
b.setTextSize(18);
b.setTag(i);
Drawable[] layers = {b.getBackground()};
Drawable d = new DecoratedTextViewDrawable(b, layers, cnt[i]);
b.setBackgroundDrawable(d);
OnClickListener l = new OnClickListener() {
@Override
public void onClick(View v) {
DecoratedTextViewDrawable d = (DecoratedTextViewDrawable) v.getBackground();
int idx = (Integer) v.getTag();
d.setCnt(++cnt[idx]);
}
};
b.setOnClickListener(l);
ll.addView(b);
}
setContentView(ll);
答案 1 :(得分:2)
使用此功能 - 并使用计数
继续更新textviews文本 <FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/your_phone_call_image"
android:gravity="center"
android:scaletype="matrix"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:padding="5dp"
android:gravity="top|right" <!--this is important-->
android:background="@drawable/your_counter_red_background"/>
</FrameLayout>
答案 2 :(得分:0)
我建议您使用FrameLayout。 1.-你可以使用2个图像,一个用于按钮,一个用于小圆圈,并使用textview查看数字... 2.-您可以为按钮使用一个图像,并为小圆圈和文本视图创建渐变..
对于frameLayout,请参阅:http://developer.android.com/reference/android/widget/FrameLayout.html 有关渐变,请参阅:How to make gradient background in android。