最近在作一个钢琴的东西,关于这个界面如何设计画了很长时间,主要是考虑到针对不一样的分辨率,若是只针对一种分辨率的话用绝对布局能够实现,实现的基本思想是每一个白色的键的位置是能够计算出来的,屏幕的宽度能够得到到,白键是将屏幕均匀的分红8份,因此每一个白键所处的位置是能够获得的,而因为黑键的实现采用的是重写ViewGroup的方法,先计算出每一个黑键的位置,而后再执行onLayout方法将黑键放在指定的位置。html
布局以下:java
<RelativeLayout android:id="@+id/mClickLayout" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal"> <ImageView android:id="@+id/mPanoClickWhiteOne" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="1" /> <ImageView android:id="@+id/mPanoClickWhiteTwo" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="2" /> <ImageView android:id="@+id/mPanoClickWhiteThree" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="3" /> <ImageView android:id="@+id/mPanoClickWhiteFour" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="4" /> <ImageView android:id="@+id/mPanoClickWhiteFive" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="5" /> <ImageView android:id="@+id/mPanoClickWhiteSix" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="6" /> <ImageView android:id="@+id/mPanoClickWhiteSeven" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="7" /> <ImageView android:id="@+id/mPanoClickWhiteEight" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1000" android:tag="8" /> </LinearLayout> <com.example.crazypano.view.BlackLayout android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/mPanoClickBlackOne" android:layout_width="fill_parent" android:layout_height="fill_parent" android:tag="9" /> <ImageView android:id="@+id/mPanoClickBlackTwo" android:layout_width="fill_parent" android:layout_height="fill_parent" android:tag="10" /> <ImageView android:id="@+id/mPanoClickBlackThree" android:layout_width="fill_parent" android:layout_height="fill_parent" android:tag="11" /> <ImageView android:id="@+id/mPanoClickBlackFour" android:layout_width="fill_parent" android:layout_height="fill_parent" android:tag="12" /> <ImageView android:id="@+id/mPanoClickBlackFive" android:layout_width="fill_parent" android:layout_height="fill_parent" android:tag="13" /> </com.example.crazypano.view.BlackLayout> </RelativeLayout>
代码以下:android
public class BlackLayout extends ViewGroup { private List<Integer> mLeftPositions; public BlackLayout(Context context, AttributeSet attrs) { super(context, attrs); mLeftPositions = new ArrayList<Integer>(); } private void addPosition(int pScreenWidth, int pChildWidth){ int pScreenUnit = pScreenWidth / 8; mLeftPositions.clear(); mLeftPositions.add(pScreenUnit - 2 * pChildWidth / 3); mLeftPositions.add(2 * pScreenUnit - pChildWidth / 3); mLeftPositions.add(4 * pScreenUnit - 2 * pChildWidth / 3); mLeftPositions.add(5 * pScreenUnit - pChildWidth / 2); mLeftPositions.add(6 * pScreenUnit - pChildWidth / 3); } @Override protected void onLayout(boolean arg0, int l, int t, int r, int b) { // TODO Auto-generated method stub int childCount = this.getChildCount(); int gap = 0; int space=0; if(this.getChildCount() >= 1){ addPosition(this.getWidth(), this.getChildAt(0).getWidth()); } for( int i = 0; i < this.getChildCount(); i++){ View child = this.getChildAt(i); child.measure(r - l, b - t); } for (int i = 0; i < childCount; i++) { View child = this.getChildAt(i); child.setVisibility(View.VISIBLE); child.measure(r - l, b - t); int childWidth = child.getMeasuredWidth(); int childHeight = child.getMeasuredHeight(); child.layout(mLeftPositions.get(i), t, mLeftPositions.get(i) + childWidth, t + childHeight); } } }在onLayout函数中首先肯定每一个黑键的位置,而后再经过onLayout函数进行位置的摆放。