SlidingMenu 左侧滑动菜单

1.MainActivity

package loveworld.slidingmenu;

import java.util.ArrayList;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.provider.ContactsContract.CommonDataKinds.Organization;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // 左側视图
        View leftViewGroup = createLeftListView();
		
        //　右側视图
        View listView = createRightListView();
        
        final SlidingMenu mSlidingMenu = new SlidingMenu(this);
        mSlidingMenu.addLeftView(leftViewGroup);
        mSlidingMenu.addRightView(listView);
        
        setContentView(mSlidingMenu);
    }

	
	private View createLeftListView() {
		LinearLayout linearLayout = new LinearLayout(getBaseContext());
		linearLayout.setLayoutParams(new LayoutParams(300, LayoutParams.FILL_PARENT));
		linearLayout.setOrientation(LinearLayout.VERTICAL);
		
		TextView textViewOne = createTextView("俺是首页", Color.BLUE);
		TextView textViewTwo = createTextView("。。
。
。。
。", Color.GRAY);
		TextView textViewThree = createTextView("俺是导航", Color.BLUE);
		TextView textViewFour = createTextView("俺有点丑", Color.GRAY);
		TextView textViewFive = createTextView("俺是设置", Color.BLUE);
		linearLayout.addView(textViewOne);
		linearLayout.addView(textViewTwo);
		linearLayout.addView(textViewThree);
		linearLayout.addView(textViewFour);
		linearLayout.addView(textViewFive);
		
		return linearLayout;
	}


	private TextView createTextView(final String text, final int color) {
		TextView textView = new TextView(getBaseContext());
		textView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
		textView.setText( text );
		textView.setPadding(0, 50, 0, 50);
		textView.setGravity(Gravity.CENTER);
		textView.setBackgroundColor(color);
		textView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				Toast.makeText(getBaseContext(), "click  " + text, Toast.LENGTH_SHORT).show();
			}
		});
		return textView;
	}
    
	private View createRightListView() {
		ListView listView = new ListView(this);
        ArrayList<String> arrayList = new ArrayList<String>();
        for (int i = 0; i < 30; i++) {
			arrayList.add("World " + i);
		}
        CustomBaseAdapter customBaseAdapter = new CustomBaseAdapter(getBaseContext(), arrayList);
        listView.setAdapter(customBaseAdapter);
        listView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
        listView.setDivider( new ColorDrawable(Color.BLACK) );
        listView.setDividerHeight(1);
        listView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int position,
					long id) {
				Toast.makeText(getBaseContext(), "World position = " + position, Toast.LENGTH_SHORT).show();
			}
		});
		return listView;
	}
	
}

2.SlidingMenu

package loveworld.slidingmenu;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.Scroller;


public class SlidingMenu extends ViewGroup {

	private View mRightView;
	private View mLeftView;
	private ScrollRunnable mScrollRunnable;
	private int mTouchSlop;
	
	// 记录按下位置，用于推断当前滚动时向左还是向右
	private int mInterceptMotionX = 0;
	
	// 记录一次移动位置，用于计算移动偏移量
	private int mLastX;
	
	public SlidingMenu(Context context) {
		super(context);
		initSlidingMenu(context);
	}

	public SlidingMenu(Context context, AttributeSet attrs) {
		super(context, attrs);
		initSlidingMenu(context);
	}

	public SlidingMenu(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		initSlidingMenu(context);
	}

	public void addLeftView(View leftView) {
		mLeftView = leftView;
		// 由于Touch分发机制，即使右側视图盖住当前视图
		// 仅仅要VISIBLE状态，都会先接收到Touch Event
		mLeftView.setVisibility(View.INVISIBLE);
		addView(leftView);
	}
	
	/**
	 * 提供右側显示视图
	 * 
	 * @param rightView
	 */
	public void addRightView(View rightView) {
		mRightView = rightView;
		
		addView(rightView);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		measureChildren(widthMeasureSpec, heightMeasureSpec);

		int widthSize = MeasureSpec.getSize(widthMeasureSpec);
		int heightSize = MeasureSpec.getSize(heightMeasureSpec);
		
		setMeasuredDimension(widthSize, heightSize);
	}
	
	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		
		if (!changed) {
			return;
		}
		
		int childCount = getChildCount();
		for (int i = 0; i < childCount; i++) {
			View childView = getChildAt(i);
			
			int measuredWidth = childView.getMeasuredWidth();
			int measuredHeight = childView.getMeasuredHeight();
			
			childView.layout(l, 0, l + measuredWidth, measuredHeight);
		}
	}
	
	
	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		
		final int actioin = ev.getAction();
		final int x = (int) ev.getX();
		
		switch (actioin) {
		case MotionEvent.ACTION_DOWN:
			mInterceptMotionX = x;
			break;

		case MotionEvent.ACTION_MOVE:
			final int deltaX = x - mInterceptMotionX;
			final int distance = Math.abs(deltaX);
			// 点击区域必须在右側视图，由于仅右側视图可移动
			// 横向移动超过一定距离，能够自己依据需求修改
			if ( canSliding(ev) && distance > mTouchSlop * 2) {

				// 置为初始值
				mLastX = x;
				if (mScrollRunnable != null) {
					mScrollRunnable.endScroll();
					mScrollRunnable = null;
				}
				
				// 拦截Touch Event 交由当前ViewGruop onTouchEvent处理
				return true;
			}
			
			break;
			
		case MotionEvent.ACTION_UP:
		case MotionEvent.ACTION_CANCEL:	
			mInterceptMotionX = 0;
			break;
		}
		
		return false;
	}
	
	
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		
		final int x = (int) event.getX();
		
		switch (event.getAction()) {
		case MotionEvent.ACTION_MOVE:
			
			scrollIfNeed(x);
			return true;
			
		case MotionEvent.ACTION_UP:
			
			autoScrollIfNeed(x);
			break;
		}
		
		return false;
	}

	private void initSlidingMenu(Context context) {
		final ViewConfiguration configuration = ViewConfiguration.get(context);
        mTouchSlop = configuration.getScaledTouchSlop();
	}
	
	/**
	 * 当前手指点击位置是否在右側视图区域内
	 * 
	 * @param event
	 * @return true 能够滚动
	 */
	private boolean canSliding(MotionEvent event) {
		
		final int scrolledXInt = (int) (event.getX() + getScrollX());
		final int scrolledYInt = (int) (event.getY() + getScrollY());
		
		Rect frame = new Rect();
		mRightView.getHitRect(frame);
		if (frame.contains(scrolledXInt, scrolledYInt)) {
			return true;
		}
		
		return false;
	}
	
	
	private void scrollIfNeed(final int x) {
		// 计算与上次的偏移量
		int deltaX = x - mLastX;
		
		// 降低移动次数
		if (x != mLastX) {
			// 显示
			if (mLeftView.getVisibility() != View.VISIBLE) {
				mLeftView.setVisibility(View.VISIBLE);
			}
			
			int l = mRightView.getLeft();
			int t = mRightView.getTop();
			int b = mRightView.getBottom();
			
			// 右側视图的滑动区域。仅仅能在左側视图范围内滑动
			int rightViewLeft = Math.max(mLeftView.getLeft(), l + deltaX);
			rightViewLeft = Math.min(mLeftView.getRight(), rightViewLeft);
			
			// 控制随手指滑动
			mRightView.layout(rightViewLeft, t, rightViewLeft + mRightView.getWidth(), b);
		}
		
		// 滑动到最左側
		if (mRightView.getLeft() == mLeftView.getLeft()) {
			mLeftView.setVisibility(View.INVISIBLE);
		}
		
		// 记录当前值供下次计算		
		mLastX = x;
	}
	
	
	private void autoScrollIfNeed(final int x) {
		mScrollRunnable = new ScrollRunnable();
		
		// 用于推断滑动方向
		final int deltaX = x - mInterceptMotionX;
		// x轴向右是依次递增与手指落下点差值，小于0说明是手指向左滑动
		boolean moveLeft = deltaX <= 0;
		
		// 滑动距离超过左側视图一半，才会沿着手指方向滚动
		final int distance = Math.abs(deltaX);
		if (distance < mLeftView.getWidth() / 2) {
			// 从哪来回哪去
			moveLeft = !moveLeft;
		}
		
		// 启动自己主动滚动
		mScrollRunnable.startScroll(moveLeft);
	}

	private class ScrollRunnable implements Runnable {
		// 滚动辅助类，提供起始位置，移动偏移。移动总时间。能够获取每次滚动距离
		private Scroller mScroller = new Scroller(getContext());
		
		@Override
		public void run() {
			final Scroller scroller = mScroller;
			// 计算滚动偏移，返回能否够接着滚动
			boolean more = scroller.computeScrollOffset();
			// 计算后获取须要滚动到的位置
			final int x = scroller.getCurrX();
			
			if (more) {
				// 与手动滚动调用的方法同样
				scrollIfNeed(x);
				// 当前子线程已经运行完，可是须要接着滚动
				// 所以把当前Runnable再次加入到消息队列中
				post(this);
			} else {
				// 不须要滚动
				endScroll();
			}
			
		}
		
		
		private void startScroll(boolean moveLeft) {
			// 滚动前设置初始值
			mLastX = mRightView.getLeft();
			
			int dx = 0;
			
			// 计算移动总距离
			if (moveLeft) {
				// 当前到左视图左側边界距离
				dx = mLeftView.getLeft() - mRightView.getLeft();
			} else {
				// 到右側边界
				dx = mLeftView.getRight() - mRightView.getLeft();
			}
			
			// 開始滚动
			mScroller.startScroll(mRightView.getLeft(), 0, dx, 0, 300);
			// 把当前Runnable加入到消息队列中
			post(this);
		}
		
		private void endScroll() {
			// 从消息队列中把当前Runnable删除，即停止滚动
			removeCallbacks(this);
		}
		
	}
}

3.CustomBaseAdapter

package loveworld.slidingmenu;

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * 
 * getView第一个參数position从0開始
 * 
 * date: 2011-11-10
 * 
 */
public class CustomBaseAdapter extends BaseAdapter
{

    private Context mContext;
    private ArrayList<String> mArrayList;
    private LayoutInflater mLayoutInflater;

    public CustomBaseAdapter(Context context, ArrayList<String> pData)
    {
        mContext = context;
        mArrayList = pData;

        mLayoutInflater = LayoutInflater.from(mContext);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {

        // 常见的优化ViewHolder
        ViewHolder viewHolder = null;
        if (null == convertView)
        {
            convertView = mLayoutInflater.inflate(R.layout.listview_item, null);

            viewHolder = new ViewHolder();
            viewHolder.content = (TextView) convertView
                    .findViewById(R.id.content);
            viewHolder.contentIcon = (ImageView) convertView
                    .findViewById(R.id.content_icon);

            convertView.setTag(viewHolder);
        }
        else
        {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        // 获取数据
        viewHolder.content.setText(mArrayList.get(position));
        viewHolder.contentIcon.setImageResource(R.drawable.ic_launcher);

        return convertView;
    }

    @Override
    public int getCount()
    {
        if (null != mArrayList)
        {
            return mArrayList.size();
        }
        else
        {
            return 0;
        }
    }

    @Override
    public Object getItem(int position)
    {
        if (null != mArrayList && position < mArrayList.size())
        {
            return mArrayList.get(position);
        }
        else
        {
            return null;
        }
    }

    @Override
    public long getItemId(int position)
    {
        return position;
    }

    private class ViewHolder
    {
        TextView content;
        ImageView contentIcon;
    }

}

4.listview_item

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/list_item_selector"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/content_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="left"/>

    <TextView
        android:id="@+id/content"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_gravity="center"
        android:layout_marginLeft="10dip"
        android:textColor="@color/content_color" />

</LinearLayout>

版权声明：本文博主原创文章。博客，未经同意不得转载。