Android动态添加SlidingDrawer抽屉控件 by 柱子ZHU-ZI

通常情况下,Android的SlidingDrawer控件都需要放到主layout文件中,然后在Activity中findViewById的方式调用.

本方法实现的是SlidingDrawer与主layout文件相分离的方式动态加载显示,思路是通过addContentView的方式动态添加SlidingDrawer.

Activity文件:   点击按钮加载显示SlidingDrawer

package test.zhuzi;

import android.os.Bundle;
import android.app.Activity;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;


public class SlidingDrawerTestActivity extends Activity {

	private Button buttonToAddDrawer;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
//		LayoutInflater layoutInflater=LayoutInflater.from(this);
//		View viewTemp=layoutInflater.inflate(R.layout.drawer,null);
//		FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(     
//				FrameLayout.LayoutParams.FILL_PARENT,     
//				FrameLayout.LayoutParams.WRAP_CONTENT);  
//		params.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL; 
//		addContentView(viewTemp, params);
		
		buttonToAddDrawer=(Button)findViewById(R.id.button1);
		buttonToAddDrawer.setOnClickListener(new Button.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				LayoutInflater layoutInflater=LayoutInflater.from(SlidingDrawerTestActivity.this);
				View viewTemp=layoutInflater.inflate(R.layout.drawer,null);
				FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(     
						FrameLayout.LayoutParams.FILL_PARENT,     
						FrameLayout.LayoutParams.WRAP_CONTENT);  
				params.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL; 
				addContentView(viewTemp, params);
			}
		});
	}

}
           

自定义的SlidingDrawer控件:

package test.zhuzi;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SlidingDrawer;

public class MyDrawer extends SlidingDrawer {
	private boolean mVertical;
	private int mTopOffset;

	public MyDrawer(Context context, AttributeSet attrs) {
		super(context, attrs);
		int orientation = attrs.getAttributeIntValue("android", "orientation",
				ORIENTATION_VERTICAL);
		mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0);
		mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
		int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
		int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
		int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);

		final View handle = getHandle();
		final View content = getContent();
		measureChild(handle, widthMeasureSpec, heightMeasureSpec);

		if (mVertical) {
			int height = heightSpecSize - handle.getMeasuredHeight()
					- mTopOffset;
			content.measure(widthMeasureSpec,
					MeasureSpec.makeMeasureSpec(height, heightSpecMode));
			heightSpecSize = handle.getMeasuredHeight() + mTopOffset
					+ content.getMeasuredHeight();
			widthSpecSize = content.getMeasuredWidth();
			if (handle.getMeasuredWidth() > widthSpecSize)
				widthSpecSize = handle.getMeasuredWidth();
		} else {
			int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset;
			getContent().measure(
					MeasureSpec.makeMeasureSpec(width, widthSpecMode),
					heightMeasureSpec);
			widthSpecSize = handle.getMeasuredWidth() + mTopOffset
					+ content.getMeasuredWidth();
			heightSpecSize = content.getMeasuredHeight();
			if (handle.getMeasuredHeight() > heightSpecSize)
				heightSpecSize = handle.getMeasuredHeight();
		}

		setMeasuredDimension(widthSpecSize, heightSpecSize);
	}
}
           

SlidingDrawer的layout布局文件 drawer.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/subLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <test.zhuzi.MyDrawer
        android:id="@+id/slidingDrawer1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:allowSingleTap="true"
        android:animateOnClick="true"
        android:background="#000000"
        android:content="@+id/content"
        android:handle="@+id/handle"
        android:orientation="vertical" >

        <Button
            android:id="@+id/handle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/ic_launcher" />

        <LinearLayout
            android:id="@+id/content"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#000000" >

            <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="1 动态添加SlidingDrawer方式\n2 动态添加SlidingDrawer方式\n3 动态添加SlidingDrawer方式\n" />
        </LinearLayout>
    </test.zhuzi.MyDrawer>

</LinearLayout>
           

主layout布局文件 main.xml :

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/mainLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

</FrameLayout>