我知道在Android中无法水平滚动网格视图。但我正在做的是在水平滚动视图中动态添加图像按钮,如下所示:
public class HorizontalScroller extends Activity {
static int l=0;
private Rect mTempRect = new Rect();
static int r1=0;
static int t=0;
static int b=0;
static int x=0;
static int y=0;
//Button[] b1 = new Button[100];
ImageButton btn[][] = new ImageButton[10][10];
//ImageButton b1 = new ImageButton(this);
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout rl = (LinearLayout)findViewById(R.id.widget92);
LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
for(int i=0;i<4;i++)
{
for(int j=0;j<10;j++)
{System.out.println("helo");
/* l=l+100;
r1=r1+100;
t=t+100;
b=b+100;*/
//button();
//ImageButton btn=new ImageButton(this);
/* Rect r = mTempRect;
r.left=10;
r.top=10;
r.right=10;
r.bottom=10;
btn[i][j].getDrawingRect(r);*/
//btn[i][j].setId(j);
Rect r = mTempRect;
r.set(0,0,0,0);
Rect r2 = mTempRect;
r2.set(0,20,0,20);
btn[i][j]=new ImageButton(this);
btn[i][j]. setBackgroundResource(R.drawable.icon);
btn[i][j].setMinimumWidth(20);
btn[i][j].setMinimumHeight(20);
params1.setMargins(5, 5, 5,5);
rl.addView(btn[i][j],params1);
System.out.println("1="+btn[i][j].getTop());
System.out.println("2="+btn[i][j].getLeft());
System.out.println("3="+btn[i][j].getRight());
System.out.println("4="+btn[i][j].getBottom());
}
}
}
}
但是我将所有图像按钮放在一行中。如何在类似网格的结构中实现它们?
答案 0 :(得分:31)
实现水平滚动GridView涉及将一些Android源代码类复制到您的代码库(AdapterView,AbsListView,GridView,ScrollBarDrawable)并添加代码来处理水平代码。这主要是复制一些代码并从上到下,从下到右等进行更改。必须复制而不是扩展的主要原因是这些类的最终性质。
我前一段时间实现了一个水平滚动的GridView,最后还是推到了github: https://github.com/jess-anders/two-way-gridview
答案 1 :(得分:11)
你可以
TableLayout
或HorizontalScrollView
LinearLayout
保持您的方法,但添加垂直LinearLayout
而不是直接添加图像。例如,纵向每纵向LinearLayout
添加三到四个图像,并重绘以在横向中仅添加两个。我会首先尝试TableLayout
方法。
PS1:下次尝试删除所有不相关的代码(代码越少,理解你所做的就越容易)。
PS2:请注意,System.out
通常会重定向到/dev/null
并因此丢失,因此我强烈建议您改为使用Log.d
。
将其改编为onCreate()方法或您需要的任何地方:
public void horizontalScrollGalleryLayout () {
HorizontalScrollView sv = new HorizontalScrollView(this);
LinearLayout llh = new LinearLayout(this);
llh.setOrientation(LinearLayout.HORIZONTAL);
LinearLayout.LayoutParams layoutParamsTV = new LinearLayout.LayoutParams(40, 40);
LinearLayout.LayoutParams layoutParamsLL = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
for (int i=0; i<20; i++) {
LinearLayout llv = new LinearLayout(this);
llv.setOrientation(LinearLayout.VERTICAL);
TestView testView1 = new TestView(this, Color.rgb(i*12, 0, 0));
TestView testView2 = new TestView(this, true, Color.rgb(i*12, i*12, 0));
TestView testView3 = new TestView(this, true, Color.rgb(0, i*12, 0));
llv.addView(testView1, layoutParamsTV);
llv.addView(testView2, layoutParamsTV);
llv.addView(testView3, layoutParamsTV);
llh.addView(llv, layoutParamsLL);
}
sv.addView(llh, layoutParamsLL);
setContentView(sv);
}
我使用一个非常简单的视图作为例子:
public class TestView extends View {
Context context;
int color;
public TestView(Context context, int color) {
super(context);
this.context = context;
this.color = color;
}
@Override
public void onDraw (Canvas canvas) {
super.onDraw(canvas);
this.setBackgroundColor(Color.LTGRAY);
Paint paint = new Paint (Paint.ANTI_ALIAS_FLAG);
paint.setColor(color);
canvas.drawCircle(20, 20, 20, paint);
}
}
答案 2 :(得分:11)
有一个非常简单的技巧。
这可能对某些人有用!!
答案 3 :(得分:7)
我这样做了:
<强> activity_main.xml中强>:
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<GridView
android:id="@+id/gridView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</GridView>
</LinearLayout>
</HorizontalScrollView>
<强> MainActivity.java 强>:
GridView gridView = (GridView) findViewById(R.id.gridView);
gridView.setNumColumns(arrayList.size());
GridViewAdapter gridViewAdapter = new GridViewAdapter(mContext, arrayList);
gridView.setAdapter(gridViewAdapter);
// Set dynamic width of Gridview
setDynamicWidth(gridView);
添加以下方法:
private void setDynamicWidth(GridView gridView) {
ListAdapter gridViewAdapter = gridView.getAdapter();
if (gridViewAdapter == null) {
return;
}
int totalWidth;
int items = gridViewAdapter.getCount();
View listItem = gridViewAdapter.getView(0, null, gridView);
listItem.measure(0, 0);
totalWidth = listItem.getMeasuredWidth();
totalWidth = totalWidth*items;
ViewGroup.LayoutParams params = gridView.getLayoutParams();
params.width = totalWidth;
gridView.setLayoutParams(params);
}
希望这会对你有所帮助。
答案 4 :(得分:3)
我已经发布了这个答案here,但这两个问题都是 相同...
从现在起,Android中有一个很好的解决方案:HorizontalGridView。
dependencies {
compile 'com.android.support:leanback-v17:23.1.0'
}
<强> your_activity.xml 强>
<!-- your stuff before... -->
<android.support.v17.leanback.widget.HorizontalGridView
android:layout_width="wrap_content"
android:layout_height="80dp"
android:id="@+id/gridView"
/>
<!-- your stuff after... -->
为您的网格元素( grid_element.xml )创建布局。我创建了一个只有一个按钮的简单文件。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button" />
</LinearLayout>
受此链接的启发:https://gist.github.com/gabrielemariotti/4c189fb1124df4556058
public class GridElementAdapter extends RecyclerView.Adapter<GridElementAdapter.SimpleViewHolder>{
private Context context;
private List<String> elements;
public GridElementAdapter(Context context){
this.context = context;
this.elements = new ArrayList<String>();
// Fill dummy list
for(int i = 0; i < 40 ; i++){
this.elements.add(i, "Position : " + i);
}
}
public static class SimpleViewHolder extends RecyclerView.ViewHolder {
public final Button button;
public SimpleViewHolder(View view) {
super(view);
button = (Button) view.findViewById(R.id.button);
}
}
@Override
public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final View view = LayoutInflater.from(this.context).inflate(R.layout.grid_element, parent, false);
return new SimpleViewHolder(view);
}
@Override
public void onBindViewHolder(SimpleViewHolder holder, final int position) {
holder.button.setText(elements.get(position));
holder.button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(context, "Position =" + position, Toast.LENGTH_SHORT).show();
}
});
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemCount() {
return this.elements.size();
}
}
private HorizontalGridView horizontalGridView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_activity);
horizontalGridView = (HorizontalGridView) findViewById(R.id.gridView);
GridElementAdapter adapter = new GridElementAdapter(this);
horizontalGridView.setAdapter(adapter);
}
答案 5 :(得分:2)
使用recyclerview将其gridlayout设置为布局管理器并将其设置为水平滚动
your recycle view.setLayoutManager(new GridLayoutManager(getActivity(),2, LinearLayoutManager.HORIZONTAL, false))
这里2是网格的列跨度