我想使用GridLayout(不是GridView)作为象棋或棋子等游戏的棋盘.由于我有点不愿意使用带有64个子视图的xml文件,我尝试以编程方式添加它们.
为了简单起见,我开始使用TextViews作为GridLayout的子视图.
我的问题是视图不是均匀分布的,我不知道如何在我的java代码中获得均匀分布.设置layout_columnWeight和layout_rowWeight没有类似“setWeight()”的方法.
目前,这是我的activity_dynamic_grid_layout.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="80dp"
android:id="@+id/ivlogo"
android:background="#ff0000"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<android.support.v7.widget.GridLayout
android:id="@+id/grid_layout"
android:background="#004080"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/ivlogo"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="36dp">
</android.support.v7.widget.GridLayout>
我在这里将GridLayout的宽度和高度设置为match_parent,但我在运行时使用ViewTreeObserver.OnPreDrawListener更改它们以获得方板.这样,彩色背景显示正方形空间.
我的onCreate()
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dynamic_grid_layout);
GridLayout gl = (GridLayout) findViewById(R.id.grid_layout);
gl.setColumnCount(8);
gl.setRowCount(8);
for(int i=0; i<gl.getRowCount(); i++)
{
GridLayout.Spec rowSpec = GridLayout.spec(i,1,GridLayout.FILL);
for(int j=0;j<gl.getColumnCount();j++)
{
GridLayout.Spec colSpec = GridLayout.spec(j,GridLayout.FILL);
TextView tvChild = new TextView(this);
tvChild.setText("[ " + i + " | " + j + " ]");
tvChild.setTextSize(18f);
tvChild.setTextColor(Color.WHITE);
tvChild.setGravity(Gravity.CENTER);
GridLayout.LayoutParams myGLP = new GridLayout.LayoutParams();
myGLP.rowSpec = rowSpec;
myGLP.columnSpec = colSpec;
gl.addView(tvChild,myGLP );
}
}
final View rootView = findViewById(R.id.dynamic_root);
rootView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener()
{
@Override
public boolean onPreDraw()
{
int w = rootView.getMeasuredWidth();
int h = rootView.getMeasuredHeight();
int min = Math.min(w,h);
ViewGroup.LayoutParams lp = gl.getLayoutParams();
lp.width = min - min % 9;
lp.height = lp.width;
gl.setLayoutParams(lp);
rootView.getViewTreeObserver().removeOnPreDrawListener(this);
return true;
}
});
}
我已经尝试过了：
我将一个TextView子项放在布局文件中,并尝试从其GridLayout.LayoutParams中复制layout_columnWeight和layout_rowWeight：
<android.support.v7.widget.GridLayout
...>
<TextView
android:id="@+id/clone_my_params"
android:text="[ 0 | 0 ]"
android:textColor="#ffffff"
android:textSize="18sp"
app:layout_column="0"
app:layout_row="0"
app:layout_columnWeight="1"
app:layout_rowWeight="1"
/>
</android.support.v7.widget.GridLayout>
在double循环之前onCreate()中的附加代码：
TextView v = (TextView)gl.findViewById(R.id.clone_my_params); v.setGravity(Gravity.CENTER); GridLayout.LayoutParams gridLayoutParamsToCopy = new GridLayout.LayoutParams(v.getLayoutParams());
在循环内部,我跳过(i,j)=(0,0)并更改
GridLayout.LayoutParams myGLP = new GridLayout.LayoutParams();
至
GridLayout.LayoutParams myGLP = new GridLayout.LayoutParams(gridLayoutParamsToCopy);
在更改之前,所有元素都在左上角,多余的空间被赋予最后一行/列.更改后,第一行/列具有多余空间,其他元素没有变化.
双循环后调用gl.invalidate()和/或gl.requestLayout()无效.
所以我似乎没有设法通过使用复制构造函数来设置所需的权重.
