layout01 = (LinearLayout)findViewById(R.id.screen01);
LayoutParams params = layout01.getLayoutParams();
params.width = 200;
params.height = 200;
layout01.setBackgroundResource(R.drawable.mylistempty);
layout01.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
LayoutParams params = layout01.getLayoutParams();
params.width = 320;
params.height = 400;
layout01.setLayoutParams(params);
layout01.setBackgroundResource(R.drawable.mylistempty); layout01.invalidate();
}
});有人知道为什么我点击后这个layout的大小没有变呢??想实现一个layout开始为200*200,点击后变成320*400,其背景为根据layout大小来变。急啊。。有人知道么?
LayoutParams params = layout01.getLayoutParams();
params.width = 200;
params.height = 200;
layout01.setBackgroundResource(R.drawable.mylistempty);
layout01.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
LayoutParams params = layout01.getLayoutParams();
params.width = 320;
params.height = 400;
layout01.setLayoutParams(params);
layout01.setBackgroundResource(R.drawable.mylistempty); layout01.invalidate();
}
});有人知道为什么我点击后这个layout的大小没有变呢??想实现一个layout开始为200*200,点击后变成320*400,其背景为根据layout大小来变。急啊。。有人知道么?
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layout01 = (LinearLayout)findViewById(R.id.screen01);
mParams = layout01.getLayoutParams();
mParams.width = 200;
mParams.height = 200;
layout01.setLayoutParams(mParams);
layout01.setBackgroundResource(R.drawable.mylistempty);
layout01.setOnClickListener(new OnClickListener() { @Override
public void onClick(View v) {
mParams.width = 320;
mParams.height = 400;
layout01.setLayoutParams(mParams);
layout01.setBackgroundResource(R.drawable.mylistempty);
}
});
LayoutParams mParams;//搞成全局变量
layout01 = (LinearLayout)findViewById(R.id.screen01);
layout01.setBackgroundColor(Color.RED);
mParams = layout01.getLayoutParams();
mParams.width = 200;
mParams.height = 200;
layout01.setLayoutParams(mParams);
layout01.setOnClickListener(new OnClickListener() { @Override
public void onClick(View v) {
mParams.width = 320;
mParams.height = 400;
layout01.setLayoutParams(mParams);
}
});
我用的launch。但是里面实现不能 下面是xml<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout007"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:background="@drawable/woodmylistbg">
<com.yao_guet.test.ScrollLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/ScrollLayoutTest"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<FrameLayout android:layout_width="fill_parent" android:id="@+id/frame01"
android:layout_height="fill_parent" android:layout_gravity="center">
<include layout="@layout/list_screen"></include>
</FrameLayout>
<!--
<FrameLayout android:layout_width="fill_parent"
android:layout_height="fill_parent" android:layout_gravity="center">
<LinearLayout android:layout_width="wrap_content"
android:id="@+id/screen01" android:layout_height="wrap_content"
android:gravity="center"> <ImageView android:id="@+id/myImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" /> </LinearLayout>
</FrameLayout>
-->
<FrameLayout android:layout_width="fill_parent"
android:layout_height="fill_parent" android:layout_gravity="center">
<LinearLayout android:id="@+id/screen02"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:background="@drawable/addtocart_sel">
</LinearLayout>
</FrameLayout>
<FrameLayout android:layout_width="fill_parent"
android:layout_height="fill_parent" android:layout_gravity="center">
<LinearLayout android:id="@+id/screen03"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:background="@drawable/navbarbg">
</LinearLayout>
</FrameLayout>
<!--
<LinearLayout android:background="#FF00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"> <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Button1" />
</LinearLayout> <LinearLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"> <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Button2" />
</LinearLayout>
-->
</com.yao_guet.test.ScrollLayout>
</LinearLayout>
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.Scroller;/**
* 仿Launcher中的WorkSapce,可以左右滑动切换屏幕的类
* @author Yao.GUET
* blog: http://blog.csdn.net/Yao_GUET
* date: 2011-05-04
*/
public class ScrollLayout extends ViewGroup { private static final String TAG = "ScrollLayout";
private Scroller mScroller;
private VelocityTracker mVelocityTracker;
private int mCurScreen;
private int mDefaultScreen = 0;
private static final int TOUCH_STATE_REST = 0;
private static final int TOUCH_STATE_SCROLLING = 1;
private static final int SNAP_VELOCITY = 600;
private int mTouchState = TOUCH_STATE_REST;
private int mTouchSlop;
private float mLastMotionX;
private float mLastMotionY;
private int offsetView = 0; //LLYY ADD public ScrollLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
// TODO Auto-generated constructor stub
} public ScrollLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
mScroller = new Scroller(context);
mCurScreen = mDefaultScreen;
mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
} @Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
if (changed) {
int childLeft = offsetView;
final int childCount = getChildCount();
for (int i=0; i<childCount; i++) {
final View childView = getChildAt(i);
if (childView.getVisibility() != View.GONE) {
final int childWidth = childView.getMeasuredWidth() - offsetView*2;
childView.layout(childLeft, 0,
childLeft+childWidth, childView.getMeasuredHeight());
childLeft += childWidth;
}
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.e(TAG, "onMeasure");
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int width = MeasureSpec.getSize(widthMeasureSpec);
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY) {
throw new IllegalStateException("ScrollLayout only canmCurScreen run at EXACTLY mode!");
}
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
if (heightMode != MeasureSpec.EXACTLY) {
throw new IllegalStateException("ScrollLayout only can run at EXACTLY mode!");
}
// The children are given the same width and height as the scrollLayout
final int count = getChildCount();
for (int i = 0; i < count; i++) {
getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);
}
// Log.e(TAG, "moving to screen "+mCurScreen);
scrollTo(mCurScreen * width, 0);
}
/**
* According to the position of current layout
* scroll to the destination page.
*/
public void snapToDestination() {
final int screenWidth = getWidth();
final int destScreen = (getScrollX()+ screenWidth/2)/screenWidth;
snapToScreen(destScreen);
}
public void snapToScreen(int whichScreen) {
// get the valid layout page
whichScreen = Math.max(0, Math.min(whichScreen, getChildCount()-1));
if (getScrollX() != (whichScreen*getWidth())) {
final int delta = whichScreen*getWidth()-getScrollX();
mScroller.startScroll(getScrollX(), 0,
delta, 0, Math.abs(delta)*2);
mCurScreen = whichScreen;
invalidate(); // Redraw the layout
}
}
public void setToScreen(int whichScreen) {
whichScreen = Math.max(0, Math.min(whichScreen, getChildCount()-1));
mCurScreen = whichScreen;
scrollTo(whichScreen*getWidth(), 0);
}
public int getCurScreen() {
return mCurScreen;
}
@Override
public void computeScroll() {
// TODO Auto-generated method stub
if (mScroller.computeScrollOffset()) {
scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
postInvalidate();
}
} @Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
}
mVelocityTracker.addMovement(event);
final int action = event.getAction();
final float x = event.getX();
final float y = event.getY();
switch (action) {
case MotionEvent.ACTION_DOWN:
Log.e(TAG, "event down!");
if (!mScroller.isFinished()){
mScroller.abortAnimation();
}
mLastMotionX = x;
break;
case MotionEvent.ACTION_MOVE:
int deltaX = (int)(mLastMotionX - x);
mLastMotionX = x;
scrollBy(deltaX, 0);
break;
case MotionEvent.ACTION_UP:
Log.e(TAG, "event : up");
// if (mTouchState == TOUCH_STATE_SCROLLING) {
final VelocityTracker velocityTracker = mVelocityTracker;
velocityTracker.computeCurrentVelocity(1000);
int velocityX = (int) velocityTracker.getXVelocity(); Log.e(TAG, "velocityX:"+velocityX);
if (velocityX > SNAP_VELOCITY && mCurScreen > 0) {
// Fling enough to move left
Log.e(TAG, "snap left");
snapToScreen(mCurScreen - 1);
} else if (velocityX < -SNAP_VELOCITY
&& mCurScreen < getChildCount() - 1) {
// Fling enough to move right
Log.e(TAG, "snap right");
snapToScreen(mCurScreen + 1);
} else {
snapToDestination();
} if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
// }
mTouchState = TOUCH_STATE_REST;
break;
case MotionEvent.ACTION_CANCEL:
mTouchState = TOUCH_STATE_REST;
break;
}
return true;
} @Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
Log.e(TAG, "onInterceptTouchEvent-slop:"+mTouchSlop);
final int action = ev.getAction();
if ((action == MotionEvent.ACTION_MOVE) &&
(mTouchState != TOUCH_STATE_REST)) {
return true;
}
final float x = ev.getX();
final float y = ev.getY();
switch (action) {
case MotionEvent.ACTION_MOVE:
final int xDiff = (int)Math.abs(mLastMotionX-x);
if (xDiff>mTouchSlop) {
mTouchState = TOUCH_STATE_SCROLLING;
}
break;
case MotionEvent.ACTION_DOWN:
mLastMotionX = x;
mLastMotionY = y;
mTouchState = mScroller.isFinished()? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING;
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
mTouchState = TOUCH_STATE_REST;
break;
}
return mTouchState != TOUCH_STATE_REST;
}
}
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Bitmap.Config;
import android.graphics.Paint.Style;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;public class ScrollLayoutTest extends Activity {
private String screenTitle [] = {"aap.com","bb.com","cc.com","sdd"};
// private ImageView image1,image2,image3; private LinearLayout layout01,layout007;
private LayoutParams params;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// layout007 = (LinearLayout)findViewById(R.id.layout007);// layout01 = (LinearLayout)findViewById(R.id.screen01); params = layout01.getLayoutParams();
params.width = 200;
params.height = 200;
layout01.setLayoutParams(params);
// image1.setImageResource(R.drawable.emptymylistmessage);
layout01.setBackgroundResource(R.drawable.emptymylistmessage);
layout01.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
params.width = 320;
params.height = 400;
layout01.setLayoutParams(params);
// image1.setImageResource(R.drawable.mylistempty);
layout01.setBackgroundResource(R.drawable.emptymylistmessage);
}
});
} public Drawable getMyImage(String title,int width,int height, boolean normal)
{
Bitmap bitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Bitmap bitmap1 = BitmapFactory.decodeResource(this.getResources(), R.drawable.navbarbg);
Bitmap bitmap2 = BitmapFactory.decodeResource(this.getResources(), R.drawable.mylistempty);
canvas.drawBitmap(bitmap1, 0, 0, null);
canvas.drawBitmap(bitmap2, 0, bitmap1.getHeight(), null);
Paint paint = new Paint();
paint.setColor(0xFF000000);
paint.setStyle(Style.STROKE);
canvas.drawText(title, width/2, bitmap1.getHeight(), paint); Drawable able = null;
// if(!normal)
// {
// Matrix m = new Matrix();
// int w = width * 1/2;
// int h = height * 1/2;
// m.postScale(w, h);
//
// Bitmap bb = Bitmap.createScaledBitmap(bitmap, w, h,false);
// able = new BitmapDrawable(bb);
// }else{
able = new BitmapDrawable(bitmap);
// } return able;
}
}