Android side slide Component Design

Source: Internet
Author: User

To achieve slide on the right side similar to the address book,

Look at the interface

The implementation code is as follows:

Friend. xml

 

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@color/background"    android:orientation="vertical" >        <include layout="@layout/friend_header"/>        <RelativeLayout         android:orientation="vertical"        android:layout_width="fill_parent"          android:layout_height="fill_parent">            <ListView android:id="@+id/list_view" android:layout_height="wrap_content" android:layout_width="fill_parent"android:scrollbars="none"android:cacheColorHint="@color/white"></ListView>        <com.example.widget.MyLetterListView    android:id="@+id/my_list_view" android:background="@drawable/corner"  android:layout_width="30dip" android:layout_height="fill_parent"android:layout_alignParentRight="true" />        </RelativeLayout></LinearLayout> 

Friend_header.xml

 

 

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="wrap_content"   android:paddingLeft="2dip"   android:paddingRight="2dip"   android:gravity="center_vertical"   android:orientation="horizontal"   android:background="@drawable/widget_bar_bg">   <TextView    android:id="@+id/friend_search_head_title"   style="@style/detail_head_title"   android:layout_gravity="center"   android:clickable="true"   android:textSize="20sp"   android:text="@string/my_friend"   ></TextView>    <ImageView   android:id="@+id/friend_center_back"   android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="right|center"   android:clickable="true"   android:textColor="@color/white"   android:background="@drawable/add_friend"    ></ImageView>   </FrameLayout>

The main component is built here, and the slide function has not been implemented yet.

 

Myletterlistview. Java

 

package com.example.widget;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Typeface;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;public class MyLetterListView extends View{OnTouchingLetterChangedListener onTouchingLetterChangedListener;String[] b = {"@","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","#"};int choose = -1;Paint paint = new Paint();boolean showBkg = false;public MyLetterListView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}public MyLetterListView(Context context, AttributeSet attrs) {super(context, attrs);}public MyLetterListView(Context context) {super(context);}protected void onDraw(Canvas canvas) {super.onDraw(canvas);if(showBkg){    canvas.drawColor(Color.parseColor("#40000000"));}    int height = getHeight();    int width = getWidth();    int singleHeight = height / b.length;    for(int i=0;i<b.length;i++){       paint.setColor(Color.BLACK);       paint.setTypeface(Typeface.DEFAULT_BOLD);       paint.setAntiAlias(true);       if(i == choose){       paint.setColor(Color.parseColor("#3399ff"));       paint.setFakeBoldText(true);       }       float xPos = width/2  - paint.measureText(b[i])/2;       float yPos = singleHeight * i + singleHeight;              canvas.drawText(b[i], xPos, yPos, paint);              paint.reset();    }   }@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {final int action = event.getAction();    final float y = event.getY();    final float x = event.getX();    final int oldChoose = choose;    final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;    final int c = (int) (y/getHeight()*b.length);    switch (action) {case MotionEvent.ACTION_DOWN:showBkg = true;if(oldChoose != c && listener != null){if(c > 0 && c< b.length){listener.onTouchingLetterChanged(b[c],y,x);choose = c;invalidate();}}break;case MotionEvent.ACTION_MOVE:if(oldChoose != c && listener != null){if(c > 0 && c< b.length){listener.onTouchingLetterChanged(b[c],y,x);choose = c;invalidate();}}break;case MotionEvent.ACTION_UP:showBkg = false;choose = -1;listener.onTouchingLetterEnd();invalidate();break;}return true;}@Overridepublic boolean onTouchEvent(MotionEvent event) {return super.onTouchEvent(event);}public void setOnTouchingLetterChangedListener(OnTouchingLetterChangedListener onTouchingLetterChangedListener) {this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;}public interface OnTouchingLetterChangedListener{public void onTouchingLetterEnd();public void onTouchingLetterChanged(String s,float y,float x);}}

 

 

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