Android中自定义ImageView添加文字设置按下效果详解

public class MyImageTextView extends LinearLayout {

 private ImageView mImageView = null;
 private TextView mTextView = null;
 private int imageId, pressImageId;
 private int textId, textColorId, textTopId, pressTextColorId;

 public MyImageTextView(Context context) {
  this(context, null);
 }

 public MyImageTextView(Context context, @Nullable AttributeSet attrs) {
  this(context, attrs, 0);
 }

 public MyImageTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  this.setOrientation(LinearLayout.VERTICAL);//设置垂直排序
  this.setGravity(Gravity.CENTER);//设置居中
  if (mImageView == null) {
   mImageView = new ImageView(context);
  }
  if (mTextView == null) {
   mTextView = new TextView(context);
  }
  if (attrs == null)
   return;
  int count = attrs.getAttributeCount();
  for (int i = 0; i < count; i++) {
   String attrName = attrs.getAttributeName(i);//获取属性名称
   //根据属性获取资源ID
   switch (attrName) {
    //显示的图片
    case "image":
     imageId = attrs.getAttributeResourceValue(i, 0);
     break;
    //按下时显示的图片
    case "pressImage":
     pressImageId = attrs.getAttributeResourceValue(i, 0);
     break;
    //显示的文字
    case "text":
     textId = attrs.getAttributeResourceValue(i, 0);
     break;
    //设置文字颜色
    case "textColor":
     textColorId = attrs.getAttributeResourceValue(i, 0);
     break;
    //设置文字距离上面图片的距离
    case "textTop":
     textTopId = attrs.getAttributeResourceValue(i, 0);
     break;
    //按下时显示的文字颜色
    case "pressTextColor":
     pressTextColorId = attrs.getAttributeResourceValue(i, 0);
     break;

   }
  }
  init();

 }

 /**
  * 初始化状态
  */
 private void init() {
  this.setText(textId);
  mTextView.setGravity(Gravity.CENTER);//字体居中
  this.setTextColor(textColorId);
  this.setTextPaddingTop(textTopId);
  this.setImgResource(imageId);
  addView(mImageView);//将图片加入
  addView(mTextView);//将文字加入
 }


 @Override
 public boolean onTouchEvent(MotionEvent event) {
  int action = event.getAction();
  switch (action) {
   //按下
   case MotionEvent.ACTION_DOWN:
    if (pressImageId != 0)
     this.setImgResource(pressImageId);
    if (pressTextColorId != 0)
     this.setTextColor(pressTextColorId);
    break;
   //移动
   case MotionEvent.ACTION_MOVE:
    break;
   //抬起
   case MotionEvent.ACTION_UP:
    if (imageId != 0)
     this.setImgResource(imageId);
    if (textColorId != 0)
     this.setTextColor(textColorId);
    break;
  }
  return super.onTouchEvent(event);
 }

 /**
  * 设置默认的图片
  *
  * @param resourceID 图片id
  */
 public void setImgResourceDefault(int resourceID) {
  imageId = resourceID;
  setImgResource(resourceID);
 }

 /**
  * 设置按下的图片
  *
  * @param resourceID 图片id
  */
 public void setImgResourcePress(int resourceID) {
  pressImageId = resourceID;
 }


 /**
  * 设置显示的图片
  *
  * @param resourceID 图片ID
  */
 private void setImgResource(int resourceID) {
  if (resourceID == 0) {
   this.mImageView.setImageResource(0);
  } else {
   this.mImageView.setImageResource(resourceID);
  }
 }


 /**
  * 设置显示的文字
  *
  * @param text
  */
 public void setText(int text) {
  this.mTextView.setText(text);
 }

 /**
  * 设置字体颜色(默认为黑色)
  *
  * @param color
  */
 private void setTextColor(int color) {
  if (color == 0) {
   this.mTextView.setTextColor(Color.BLACK);
  } else {
   this.mTextView.setTextColor(getResources().getColor(color));
  }
 }

 /**
  * 设置默认的颜色
  *
  * @param color 颜色ID
  */
 public void setTextDefaultColor(int color) {
  textColorId = color;
  setTextColor(color);
 }

 /**
  * 设置按下的颜色
  *
  * @param color 颜色ID
  */
 public void setTextPressColor(int color) {
  pressImageId = color;
 }

 /**
  * 设置字体大小
  *
  * @param size
  */
 public void setTextSize(float size) {
  this.mTextView.setTextSize(size);
 }


 /**
  * 设置文字与上面的距离
  * @param top
  */
 public void setTextPaddingTop(int top) {
  if (top != 0)
   this.mTextView.setPadding(0, getResources().getDimensionPixelOffset(top), 0, 0);
 }


}

<?xml version="1.0" encoding="utf-8"?>
<resources>

 <declare-styleable name="imageText">
  <attr name="image" format="integer" />
  <attr name="pressImage" format="integer" />
  <attr name="text" format="integer" />
  <attr name="textColor" format="integer" />
  <attr name="pressTextColor" format="integer" />
  <attr name="textTop" format="integer" />
 </declare-styleable>
</resources>