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ViewUtil.java
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package common.base.utils;
import android.app.Activity;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.lang.reflect.Field;
import common.base.R;
/**
* User: fee(1176610771@qq.com)
* Date: 2016-06-14
* Time: 15:19
* DESC:
*/
public class ViewUtil{
public static <T> T findViewInContainer(ViewGroup containerView, int toFindViewResId) {
if (toFindViewResId < 1 || containerView == null) {
return null;
}
return (T) containerView.findViewById(toFindViewResId);
}
public static <T> T findAViewById(Activity curActivity, int toFindViewResId) {
if (curActivity == null || toFindViewResId < 1) {
return null;
}
return (T) curActivity.findViewById(toFindViewResId);
}
/**
* Convert Dp to Pixel
*/
public static int dpToPx(float dp, Resources resources){
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, resources.getDisplayMetrics());
return (int) px;
}
public static int getRelativeTop(View myView) {
// if (myView.getParent() == myView.getRootView())
if(myView.getId() == android.R.id.content)
return myView.getTop();
else
return myView.getTop() + getRelativeTop((View) myView.getParent());
}
public static int getRelativeLeft(View myView) {
// if (myView.getParent() == myView.getRootView())
if(myView.getId() == android.R.id.content)
return myView.getLeft();
else
return myView.getLeft() + getRelativeLeft((View) myView.getParent());
}
/**
* 改变一个View背景的资源的颜色
* @param view
* @param argbColor
*/
public static void changeViewBgDrawableColor(View view, int argbColor) {
if (view != null) {
GradientDrawable gradientDrawable;
try {
gradientDrawable = (GradientDrawable) view.getBackground();
gradientDrawable.setColor(argbColor);
} catch (Exception e) {
}
}
}
/**
* 给图像着色
* @param originDrawable 源图像，可以是View的背景图
* @param colors
* @return 着色后的Drawable
* 参考：http://www.race604.com/tint-drawable/
*/
public static Drawable tintDrawable(Drawable originDrawable, ColorStateList colors) {
final Drawable wrappedDrawable = DrawableCompat.wrap(originDrawable);
if (wrappedDrawable != null) {//avoid nullpointer exception
DrawableCompat.setTintList(wrappedDrawable, colors);
}
return wrappedDrawable;
}
/**
* 用来改变ImageView的饱和度的
* @param target
* @param saturationValue
*/
public static void changeImageViewSaturation(ImageView target, int saturationValue) {
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(saturationValue);
ColorMatrixColorFilter colorMatrixColorFilter = new ColorMatrixColorFilter(colorMatrix);
target.setColorFilter(colorMatrixColorFilter);
}
/**
* 修改一张源位图的饱和度来生成一个新位图
* @param sourceBitmap 源位图
* @param expectantSaturation 期望的饱和度值
* @return 更改饱和度后的新位图
*/
public static Bitmap changeSrcBitmapSaturation(Bitmap sourceBitmap,int expectantSaturation) {
int width = sourceBitmap.getWidth();
int height = sourceBitmap.getHeight();
Bitmap compoundResultBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(compoundResultBitmap);
Paint paint = new Paint();
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(expectantSaturation);
ColorMatrixColorFilter colorMatrixFilter = new ColorMatrixColorFilter(colorMatrix);
paint.setColorFilter(colorMatrixFilter);
canvas.drawBitmap(sourceBitmap, 0, 0, paint);
return compoundResultBitmap;
}
/**
* 给输入框控件View的光标着色
* Android 3.1 (API 12) 开始就支持了 textCursorDrawable，
* 也就是可以自定义光标的 Drawable。遗憾的是，这个方法只能在 xml 中使用
* 所以通过反射来设置
* @param curEditText
* @param expectedCursorColor 所期望的光标颜色
* 参考：http://www.race604.com/tint-drawable/
*/
public static void tintCursorDrawable(EditText curEditText, int expectedCursorColor) {
Field fCursorDrawableRes = ReflectUtil.getFidelOfClass(TextView.class, "mCursorDrawableRes");
if (fCursorDrawableRes == null) {
return;
}
try {
//拿到TextView类中所定义的mCursorDrawableRes 当前的值
int mCursorDrawableRes = fCursorDrawableRes.getInt(curEditText);
if (mCursorDrawableRes <= 0) {
return;
}
//拿到cursorDrawable 的资源图像对象
Drawable cursorDrawable = curEditText.getContext().getResources().getDrawable(mCursorDrawableRes);
if (cursorDrawable == null) {
return;
}
//拿到TextView中Editor属性对象,Editor类被Android系统隐藏了@hide
Field fieldMEditor = ReflectUtil.getFidelOfClass(TextView.class, "mEditor");
Object mEditor = fieldMEditor.get(curEditText);
//从Editro类中获取mCursorDrawable属性
Field mCursorDrawableField = ReflectUtil.getFieldOfObject(mEditor, "mCursorDrawable");
Drawable tintedCursorDrawable = tintDrawable(cursorDrawable, ColorStateList.valueOf(expectedCursorColor));
Drawable[] newCursorDrawables = new Drawable[]{tintedCursorDrawable, tintedCursorDrawable};
//更改mEditor中mCursorDrawable属性对象的值
mCursorDrawableField.set(curEditText, newCursorDrawables);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 校验文本输入框当前是否输入的是空格
* @param curEditText
* @return true 当前输入的是空格; false:不是
*/
public static boolean checkEditTextInputedNull(EditText curEditText) {
boolean curInputedNull = false;
if (curEditText == null) {
return curInputedNull;
}
String textAfterInputed = curEditText.getText().toString();
int newLen = textAfterInputed.length();
if (newLen > 0) {
char[] chars = textAfterInputed.toCharArray();
curInputedNull = chars[newLen - 1] == ' ';
if (curInputedNull) {
if (newLen == 1) {
curEditText.setText("");//替换成空字符串，此空字符串的Len = 0;
}
else{//输入后的文本不只有1个字符的情况，把空字符给去除掉
String trimedStr = textAfterInputed.trim();
curEditText.setText(trimedStr);
curEditText.setSelection(trimedStr.length());//并将光标移到文本末尾
}
}
}
return curInputedNull;
}
/**
* 阻止快速点击视图
* @param clickedView 被点击的View控件
* @param needGapMillTimes 两次点击需要间隔的毫秒时间
* @return true:需要阻止此次点击；false:不需要，即为有效点击
*/
public static boolean preventFastClickView(View clickedView, long needGapMillTimes) {
int tagKey = R.id.view_double_click_tag_id;
String lastClickTimeStr = (String) clickedView.getTag(tagKey);
boolean need2PreVent = false;
long lastClickMillTime = 0;
if (!Util.isEmpty(lastClickTimeStr)) {
try {
lastClickMillTime = Long.parseLong(lastClickTimeStr);
} catch (Exception e) {
}
}
long curClickMillTime = System.currentTimeMillis();
if ((curClickMillTime - lastClickMillTime) < needGapMillTimes) {
need2PreVent = true;
}
clickedView.setTag(tagKey, curClickMillTime + "");
return need2PreVent;
}
/**
* 依据ListView的Chilc Views 计算所需要绘制的高度
* @param listView
*/
public static void resolveListViewWholeH(ListView listView) {
if (listView == null || listView.getAdapter() == null) {
return;
}
ListAdapter listAdapter = listView.getAdapter();
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
// params.height += 5;// if without this statement,the listview will be
// a
// little short
// listView.getDividerHeight()获取子项间分隔符占用的高度
// params.height最后得到整个ListView完整显示需要的高度
listView.setLayoutParams(params);
}
/**
* 获取一个Activity中所在的window中的用来填充该activity布局的容器视图
* @param curActivity
* @return 可能通过
*/
public static FrameLayout getContentContainerView(Activity curActivity) {
FrameLayout contentLayout = null;
if (curActivity != null) {
return (FrameLayout) curActivity.getWindow().getDecorView().findViewById(android.R.id.content);
}
return contentLayout;
}
}