Android登陆弹出界面 实例源码下载

【实例截图】

【核心代码】

package com.example.logindialog.view;

import com.example.logindialog.R;
import com.example.logindialog.tools.BaseTools;

import android.content.Context;
import android.graphics.Color;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
/**
 * Scroller应用
 * @author Ra
 * blog : http://blog.csdn.net/vipzjyno1/
 */
public class LoginView extends RelativeLayout {
/** Scroller 拖动类 */
private Scroller mScroller;
/** 屏幕高度  */
private int mScreenHeigh = 0;
/** 屏幕宽度  */
private int mScreenWidth = 0;
/** 点击时候Y的坐标*/
private int downY = 0;
/** 拖动时候Y的坐标*/
private int moveY = 0;
/** 拖动时候Y的方向距离*/
private int scrollY = 0;
/** 松开时候Y的坐标*/
private int upY = 0;
/** 是否在移动*/
private Boolean isMoving = false;
/** 布局的高度*/
private int viewHeight = 0;
/** 是否打开*/
public boolean isShow = false;
/** 是否可以拖动*/
public boolean mEnabled = true;
/** 点击外面是否关闭该界面*/
public boolean mOutsideTouchable = true;
/** 上升动画时间 */
private int mDuration = 800;
private final static String TAG = "LoginView";
public LoginView(Context context) {
super(context);
init(context);
}

public LoginView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}

public LoginView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}

private void init(Context context) {
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setFocusable(true);
mScroller = new Scroller(context);
mScreenHeigh = BaseTools.getWindowHeigh(context);
mScreenWidth = BaseTools.getWindowWidth(context);
// 背景设置成透明
this.setBackgroundColor(Color.argb(0, 0, 0, 0));
final View view = LayoutInflater.from(context).inflate(R.layout.view_login,null);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);// 如果不给他设这个，它的布局的MATCH_PARENT就不知道该是多少
addView(view, params);// ViewGroup的大小，
// 背景设置成透明
this.setBackgroundColor(Color.argb(0, 0, 0, 0));
view.post(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
viewHeight = view.getHeight();
}
});
LoginView.this.scrollTo(0, mScreenHeigh);
ImageView btn_close = (ImageView)view.findViewById(R.id.btn_close);
btn_close.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dismiss();
}
});
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if(!mEnabled){
return false;
}
return super.onInterceptTouchEvent(ev);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
downY = (int) event.getY();
Log.d(TAG, "downY = " downY);
//如果完全显示的时候，让布局得到触摸监听，如果不显示，触摸事件不拦截，向下传递
if(isShow){
return true;
}
break;
case MotionEvent.ACTION_MOVE:
moveY = (int) event.getY();
scrollY = moveY - downY;
//向下滑动
if (scrollY > 0) {
if(isShow){
scrollTo(0, -Math.abs(scrollY));
}
}else{
if(mScreenHeigh - this.getTop() <= viewHeight && !isShow){
scrollTo(0, Math.abs(viewHeight - scrollY));
}
}
break;
case MotionEvent.ACTION_UP:
upY = (int) event.getY();
if(isShow){
if( this.getScrollY() <= -(viewHeight /2)){
startMoveAnim(this.getScrollY(),-(viewHeight - this.getScrollY()), mDuration);
isShow = false;
Log.d("isShow", "false");
} else {
startMoveAnim(this.getScrollY(), -this.getScrollY(), mDuration);
isShow = true;
Log.d("isShow", "true");
}
}
Log.d("this.getScrollY()", "" this.getScrollY());
changed();
break;
case MotionEvent.ACTION_OUTSIDE:
Log.d(TAG, "ACTION_OUTSIDE");
break;
default:
break;
}
return super.onTouchEvent(event);
}

/**
* 拖动动画
* @param startY  
* @param dy  移动到某点的Y坐标距离
* @param duration 时间
*/
public void startMoveAnim(int startY, int dy, int duration) {
isMoving = true;
mScroller.startScroll(0, startY, 0, dy, duration);
invalidate();//通知UI线程的更新
}

@Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) {
scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
// 更新界面
postInvalidate();
isMoving = true;
} else {
isMoving = false;
}
super.computeScroll();
}

/** 开打界面 */
public void show(){
if(!isShow && !isMoving){
LoginView.this.startMoveAnim(-viewHeight,   viewHeight, mDuration);
isShow = true;
Log.d("isShow", "true");
changed();
}
}

/** 关闭界面 */
public void dismiss(){
if(isShow && !isMoving){
LoginView.this.startMoveAnim(0, -viewHeight, mDuration);
isShow = false;
Log.d("isShow", "false");
changed();
}
}

/** 是否打开 */
public boolean isShow(){
return isShow;
}

/** 获取是否可以拖动*/
public boolean isSlidingEnabled() {
return mEnabled;
}

/** 设置是否可以拖动*/
public void setSlidingEnabled(boolean enabled) {
mEnabled = enabled;
}

/**
* 设置监听接口，实现遮罩层效果
*/
public void setOnStatusListener(onStatusListener listener){
this.statusListener = listener;
}

    public void setOutsideTouchable(boolean touchable) {
        mOutsideTouchable = touchable;
    }
/**
* 显示状态发生改变时候执行回调借口
*/
public void changed(){
if(statusListener != null){
if(isShow){
statusListener.onShow();
}else{
statusListener.onDismiss();
}
}
}

/** 监听接口*/
public onStatusListener statusListener;

/**
* 监听接口，来在主界面监听界面变化状态
*/
public interface onStatusListener{
/**  开打状态  */
public void onShow();
/**  关闭状态  */
public void onDismiss();
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
super.onLayout(changed, l, t, r, b);
}
}