Android-不显示多个视图。(仅显示第一个视图)
我找了很多,但没有找到解决我问题的办法。创建多个视图并尝试将其添加到线性布局时,仅显示第一个视图(蛋糕) 这里是我创建和添加视图的地方Android-不显示多个视图。(仅显示第一个视图),android,android-layout,android-view,Android,Android Layout,Android View,我找了很多,但没有找到解决我问题的办法。创建多个视图并尝试将其添加到线性布局时,仅显示第一个视图(蛋糕) 这里是我创建和添加视图的地方 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); LinearLayout linearLayout = (Linear
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.image_View);
PlayAreaView cake = new PlayAreaView(SecondTestActivity.this, R.drawable.cake);
views.add(cake);
PlayAreaView bomb = new PlayAreaView(SecondTestActivity.this, R.drawable.bomb);
views.add(bomb);
PlayAreaView crown = new PlayAreaView(SecondTestActivity.this, R.drawable.crown);
views.add(crown);
PlayAreaView scissors = new PlayAreaView(SecondTestActivity.this, R.drawable.cut);
views.add(scissors);
PlayAreaView trash = new PlayAreaView(SecondTestActivity.this, R.drawable.bin_closed);
views.add(trash);
PlayAreaView key = new PlayAreaView(SecondTestActivity.this, R.drawable.bullet_key);
views.add(key);
LayoutParams params
= new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
for(View v : views){
Log.v("created", "view created");
v.setLayoutParams(params);
linearLayout.addView(v);
}
}
这是我的main.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/main_View"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="@+id/image_View"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
</LinearLayout>
</FrameLayout>
我可以创建一个视图,但无法在线性布局中添加多个视图。为什么会这样?如果你看,有另一个人基本上也有同样的问题。但是,它们没有声明布局的方向,因此默认为水平。在布局中,您已明确声明为水平。是否打算这样做(例如,让项目并排显示)?如果没有,请将方向更改为垂直,这样您应该会感觉良好
如果您需要它们并排显示,那么我不知道如何做到这一点,但我想您需要声明每个视图都与放置在它前面的视图相邻(例如,使用类似“alignToRightOf”的内容)。同样,这只是一种冒险,但它可能会让您走上正确的道路
希望这有帮助。我找到了问题的答案。我不完全理解活动是如何处理视图的。为了绘制多个单独的视图,我必须在添加到数组中的每个视图上循环,并在自定义视图中调用重写的draw方法。理解了这一点后,我能够创建多个视图并添加单独的draggi在每个视图上使用ng函数。下面是代码
public class ThirdTestActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout layout = (LinearLayout) findViewById(R.id.main_View);
layout.addView(new MyCircles(this));
}
private class MyCircles extends View{
private Context myContext;
private ArrayList<MyCircle> circles = new ArrayList<MyCircle>();
private int size = 10;
public MyCircles(Context context) {
super(context);
myContext = context;
addCircles();
}
private void addCircles(){
for (int i = 0; i < size; i++){
circles.add(new MyCircle(myContext, R.drawable.skullcrossbones, i * 40, 50));
}
}
@Override
protected void onDraw(Canvas canvas){
for (View v : circles){
v.draw(canvas);
}
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
int mouseX = (int)event.getX();
int mouseY = (int)event.getY();
MyCircle image = null;
for(MyCircle images : circles){
//Log.v("image checked X: " + images.imageX + ", Y: " + images.imageY, "checked");
// Is the event inside of this view?
if(images.getImageRect().contains((int)event.getX(), (int)event.getY()))
{
image = images;
}
}
if (image != null){
if(event.getAction() == MotionEvent.ACTION_DOWN)
{
Log.v("touched down", "touched down at X: " + mouseX + ", Y: " + mouseY);
image.dragDistance = new Point(mouseX, mouseY);
bringToFront();
isSelected();
return true;
}
else if(event.getAction() == MotionEvent.ACTION_MOVE)
{
Log.v("move", "moving to X: " + mouseX + ", Y: " + mouseY);
image.dragDistance.set(mouseX, mouseY);
invalidate();
return true;
}
}
return super.onTouchEvent(event);
}
}
private class MyCircle extends View{
private int imageId;
private Drawable image;
private Context myContext;
private int size = 48;
private int imageOffset = size/2;
private int imageX;
private int imageY;
private Point dragDistance;
public MyCircle(Context context, int id, int x, int y) {
super(context);
myContext = context;
imageId = id;
imageX = x;
imageY = y;
dragDistance = new Point(imageX + imageOffset, imageY + imageOffset);
}
public Rect getImageRect(){
return image.getBounds();
}
@Override
public void draw(Canvas canvas) {
//Log.v("draw","drawn");
super.onDraw(canvas);
image = myContext.getResources().getDrawable(imageId);
imageX = (dragDistance.x - imageOffset);
imageY = (dragDistance.y - imageOffset);
image.setBounds(imageX, imageY, imageX + size, imageY + size);
image.draw(canvas);
}
}
}
公共类ThirdTestActivity扩展活动{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout布局=(LinearLayout)findViewById(R.id.main\U视图);
layout.addView(新的MyCircles(this));
}
私有类MyCircles扩展视图{
私人语境;
私有ArrayList圆圈=新ArrayList();
私有整数大小=10;
公共MyCircles(上下文){
超级(上下文);
myContext=上下文;
addCircles();
}
私有void addCircles(){
对于(int i=0;i
这是为Android版本2.1 API 7编写的