SelectorHepler工具类
一般需要点击效果或者选中、焦点的状态改变后也改变效果的话,需要在drawable文件夹下面新建一个xml文件,然后写一个selector。相对来说比较麻烦,所以我写了一个用代码快速建一个selector的工具类。
SelectorHepler代码:
import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.InsetDrawable;
import android.graphics.drawable.LayerDrawable;
import android.graphics.drawable.StateListDrawable;
public class SelectorHepler {
private static SelectorHepler util;
public static SelectorHepler getInstance() {
if (util == null) {
util = new SelectorHepler();
}
return util;
}
private SelectorHepler() {
super();
}
/**
* 传入Drawable的id,得到一个Selector,一般给setBackgroundDrawable使用
* @param context
* @param idNormal
* @param idPressed
* @param idFocused
* @param idUnable
* @return
*/
public StateListDrawable getSelectorDrawable(Context context, int idNormal,
int idPressed, int idFocused, int idUnable) {
StateListDrawable bg = new StateListDrawable();
Drawable normal = idNormal == -1 ? null : context.getResources()
.getDrawable(idNormal);
Drawable pressed = idPressed == -1 ? null : context.getResources()
.getDrawable(idPressed);
Drawable focused = idFocused == -1 ? null : context.getResources()
.getDrawable(idFocused);
Drawable unable = idUnable == -1 ? null : context.getResources()
.getDrawable(idUnable);
// View.PRESSED_ENABLED_STATE_SET
bg.addState(new int[] { android.R.attr.state_pressed,
android.R.attr.state_enabled }, pressed);
// View.ENABLED_FOCUSED_STATE_SET
bg.addState(new int[] { android.R.attr.state_enabled,
android.R.attr.state_focused }, focused);
// View.ENABLED_STATE_SET
bg.addState(new int[] { android.R.attr.state_enabled }, normal);
// View.FOCUSED_STATE_SET
bg.addState(new int[] { android.R.attr.state_focused }, focused);
// View.WINDOW_FOCUSED_STATE_SET
bg.addState(new int[] { android.R.attr.state_window_focused }, unable);
// View.EMPTY_STATE_SET
bg.addState(new int[] {}, normal);
return bg;
}
/**
* 得到点击改变状态的Selector,一般给setBackgroundDrawable使用
* @param context
* @param idNormal
* @param idPressed
* @return
*/
public StateListDrawable getPressedSelectorDrawable(Context context, int idNormal,
int idPressed) {
Drawable normal = idNormal == -1 ? null : context.getResources()
.getDrawable(idNormal);
Drawable pressed = idPressed == -1 ? null : context.getResources()
.getDrawable(idPressed);
StateListDrawable bg = getPressedSelectorDrawable( normal, pressed);
return bg;
}
/**
* 得到点击改变状态的Selector,一般给setBackgroundDrawable使用
* @param normal
* @param pressed
* @return
*/
public StateListDrawable getPressedSelectorDrawable(
Drawable normal, Drawable pressed) {
StateListDrawable bg = new StateListDrawable();
bg.addState(new int[] { android.R.attr.state_pressed,
android.R.attr.state_enabled }, pressed);
bg.addState(new int[] { android.R.attr.state_enabled }, normal);
bg.addState(new int[] {}, normal);
return bg;
}
/**得到选中改变状态的Selector,一般给setBackgroundDrawable使用
* @param context
* @param idNormal
* @param idchecked
* @return
*/
public StateListDrawable getCheckedSelectorDrawable(Context context, int idNormal,
int idchecked) {
Drawable normal = idNormal == -1 ? null : context.getResources()
.getDrawable(idNormal);
Drawable checked = idchecked == -1 ? null : context.getResources()
.getDrawable(idchecked);
StateListDrawable bg = getCheckedSelectorDrawable(normal, checked);
return bg;
}
/**
* 得到选中改变状态的Selector,一般给setBackgroundDrawable使用
* @param normal
* @param checked
* @return
*/
public StateListDrawable getCheckedSelectorDrawable(
Drawable normal, Drawable checked) {
StateListDrawable bg = new StateListDrawable();
bg.addState(new int[] { android.R.attr.state_checked,
android.R.attr.state_enabled }, checked);
bg.addState(new int[] { android.R.attr.state_enabled }, normal);
bg.addState(new int[] {}, normal);
return bg;
}
/**
* 得到焦点改变即改变状态的Selector,一般给setBackgroundDrawable使用
* @param context
* @param idNormal
* @param idchecked
* @return
*/
public StateListDrawable getFocusedSelectorDrawable(Context context, int idNormal,
int idchecked) {
Drawable normal = idNormal == -1 ? null : context.getResources()
.getDrawable(idNormal);
Drawable checked = idchecked == -1 ? null : context.getResources()
.getDrawable(idchecked);
StateListDrawable bg = getFocusedSelectorDrawable(normal, checked);
return bg;
}
/**
* 得到焦点改变即改变状态的Selector,一般给setBackgroundDrawable使用
* @param normal
* @param focused
* @return
*/
public StateListDrawable getFocusedSelectorDrawable(
Drawable normal, Drawable focused) {
StateListDrawable bg = new StateListDrawable();
bg.addState(new int[] { android.R.attr.state_enabled,
android.R.attr.state_focused }, focused);
bg.addState(new int[] { android.R.attr.state_focused }, focused);
bg.addState(new int[] { android.R.attr.state_enabled }, normal);
bg.addState(new int[] {}, normal);
return bg;
}
/**
* 得到可以改变状态的Selector,一般给setTextColor使用
* @param normal
* @param pressed
* @param focused
* @param unable
* @param checked
* @return
*/
public ColorStateList getColorStateList(int normal, int pressed,
int focused, int unable, int checked) {
int[] colors = new int[] { pressed, focused, normal, focused, unable,
checked, normal };
int[][] states = new int[7][];
states[0] = new int[] { android.R.attr.state_pressed,
android.R.attr.state_enabled };
states[1] = new int[] { android.R.attr.state_enabled,
android.R.attr.state_focused };
states[2] = new int[] { android.R.attr.state_enabled };
states[3] = new int[] { android.R.attr.state_focused };
states[4] = new int[] { android.R.attr.state_window_focused };
states[5] = new int[] { android.R.attr.state_checked,
android.R.attr.state_enabled };
states[6] = new int[] {};
ColorStateList colorList = new ColorStateList(states, colors);
return colorList;
}
/**
* 得到点击改变状态的Selector,一般给setTextColor使用
* @param normal
* @param pressed
* @return
*/
public ColorStateList getPressedSelectorColor(int normal, int pressed) {
int[] colors = new int[] { pressed, normal, normal };
int[][] states = new int[3][];
states[0] = new int[] { android.R.attr.state_pressed,
android.R.attr.state_enabled };
states[1] = new int[] { android.R.attr.state_enabled };
states[2] = new int[] {};
ColorStateList colorList = new ColorStateList(states, colors);
return colorList;
}
/**
* 得到选中改变状态的Selector,一般给setTextColor使用
* @param normal
* @param pressed
* @return
*/
public ColorStateList getCheckedSelectorColor(int normal, int pressed) {
int[] colors = new int[] { pressed, normal, normal };
int[][] states = new int[3][];
states[0] = new int[] { android.R.attr.state_checked,
android.R.attr.state_enabled };
states[1] = new int[] { android.R.attr.state_enabled };
states[2] = new int[] {};
ColorStateList colorList = new ColorStateList(states, colors);
return colorList;
}
/**
* 将多张图片合并生成一个Drawable
* @param down
* @param up
* @return
*/
public LayerDrawable getLayerDrawable(Drawable down, Drawable up) {
Drawable[] layerList = { new InsetDrawable(down, 0, 0, 0, 0),
new InsetDrawable(up, 0, 0, 0, 0) };
return new LayerDrawable(layerList);
}
/**
* 将多张图片生成一个连续播放的Drawable动画
* @param time
* @param dr
* @return
*/
public AnimationDrawable getAnimationDrawable(int time, Drawable... dr) {
AnimationDrawable animationDrawable = new AnimationDrawable();
for (int i = 0; i < dr.length; i++) {
animationDrawable.addFrame(dr[i], time);
}
animationDrawable.setOneShot(false);
animationDrawable.start();
return animationDrawable;
}
}
使用方法:
ColorStateList color = SelectorHepler.getInstance()
.getPressedSelectorColor(Color.WHITE, Color.BLUE);
StateListDrawable drawable = SelectorHepler.getInstance()
.getPressedSelectorDrawable(this, R.drawable.ic_normal,
R.drawable.ic_pressed);
tv.setTextColor(color);
tv.setBackgroundDrawable(drawable);
时间: 2024-10-30 00:29:59