我想有一个2x2网格内的按钮。这只是ICS,所以我试图使用新的GridLayout给定。

这是我的布局的XML:

 <?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/favorites_grid"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#00ff00"
    android:rowCount="2"
    android:columnCount="2">
  <Button
      android:text="Cell 0"
      android:layout_row="0"
      android:layout_column="0"
      android:textSize="14dip" />
  <Button
      android:text="Cell 1"
      android:layout_row="0"
      android:layout_column="1"
      android:textSize="14dip" />

  <Button
      android:text="Cell 2"
      android:layout_row="1"
      android:layout_column="0"
      android:textSize="14dip" />
  <Button
      android:text="Cell 3"
      android:layout_row="1"
      android:layout_column="1"
      android:textSize="14dip" />
</GridLayout>

问题是我的视图没有为每一行均匀地拉伸。这导致GridLayout的右侧有很多额外的空间。

我尝试设置layout_gravity="fill_horizontal",但这只适用于该行的最后一个视图。这意味着单元格1会一直延伸,为单元格0提供足够的空间。

如何解决这个问题?


当前回答

你可以动态设置每个子节点的宽度:

GridLayout.LayoutParams params = (GridLayout.LayoutParams) child.getLayoutParams();
    params.width = (parent.getWidth()/parent.getColumnCount()) -params.rightMargin - params.leftMargin;
    child.setLayoutParams(params);

其他回答

你可以动态设置每个子节点的宽度:

GridLayout.LayoutParams params = (GridLayout.LayoutParams) child.getLayoutParams();
    params.width = (parent.getWidth()/parent.getColumnCount()) -params.rightMargin - params.leftMargin;
    child.setLayoutParams(params);

给你:

Button button = new Button(this);
// weight = 1f , gravity = GridLayout.FILL 
GridLayout.LayoutParams param= new GridLayout.LayoutParams(GridLayout.spec(
            GridLayout.UNDEFINED,GridLayout.FILL,1f),
            GridLayout.spec(GridLayout.UNDEFINED,GridLayout.FILL,1f));
// Layout_height = 0 ,Layout_weight = 0
params.height =0;                                                                                                           
params.width = 0;
button.setLayoutParams(param);

我终于找到了解决办法。就像Rotemmiz说的,你必须在之后动态地做。这段代码拉伸按钮以水平填充视图,但同样可以用于垂直填充视图。

public void fillview(android.support.v7.widget.GridLayout gl)
{
    Button buttontemp;

    //Stretch buttons
    int idealChildWidth = (int) ((gl.getWidth()-20*gl.getColumnCount())/gl.getColumnCount());
    for( int i=0; i< gl.getChildCount();i++)
    {
        buttontemp = (Button) gl.getChildAt(i);
        buttontemp.setWidth(idealChildWidth);
    }
}

(20是内部和外部的填充和空白。这可以更普遍地做,但这个要干净得多)

然后可以这样调用:

    android.support.v7.widget.GridLayout gl = (android.support.v7.widget.GridLayout)findViewById(R.id.buttongrid);
    ViewTreeObserver vto = gl.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {@Override public void onGlobalLayout() 
    {

            android.support.v7.widget.GridLayout gl = (android.support.v7.widget.GridLayout) findViewById(R.id.buttongrid);
            fillview(gl);

            ViewTreeObserver obs = gl.getViewTreeObserver();
            obs.removeGlobalOnLayoutListener(this);
    }});

它必须用一个观察者来完成,因为我们需要在调用视图之前等待视图被绘制。

结果:

试试这样做:

    final int MAX_COLUMN = gridView.getColumnCount(); //5
    final int MAX_ROW = gridView.getRowCount(); //7
    final int itemsCount = MAX_ROW * MAX_COLUMN; //35

    int row = 0, column = 0;

    for (int i = 0; i < itemsCount; i++) {
        ImageView view = new ImageView(this);

        //Just to provide alternate colors
        if (i % 2 == 0) {
            view.setBackgroundColor(Color.RED);
        } else {
            view.setBackgroundColor(Color.GREEN);
        }

        GridLayout.LayoutParams params = new GridLayout.LayoutParams(GridLayout.spec(row, 1F), GridLayout.spec(column, 1F));
        view.setLayoutParams(params);
        gridView.addView(view);

        column++;

        if (column >= MAX_COLUMN) {
            column = 0;
            row++;
        }
    }

如果你想要单元格的特定宽度和高度,那么使用:

     params.width = 100; // Your width
     params.height = 100; //your height

       <GridLayout
        android:layout_width="match_parent"
        android:layout_weight="3"
        android:columnCount="2"
        android:padding="10dp"
        android:rowCount="3"
        android:background="@drawable/background_down"
        android:layout_height="0dp">


        <androidx.cardview.widget.CardView
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_margin="10dp"
            android:elevation="10dp"
            app:cardCornerRadius="15dp"
            >
            <LinearLayout
                android:weightSum="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >

                <ImageView
                    android:layout_weight="2"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_margin="15dp"
                    android:src="@drawable/user" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Users"
                    android:textSize="16sp"
                    android:layout_marginStart="15dp"
                    android:layout_marginLeft="15dp" />
            </LinearLayout>

        </androidx.cardview.widget.CardView>
        <androidx.cardview.widget.CardView
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_margin="10dp"
            android:elevation="10dp"
            app:cardCornerRadius="15dp"
            >
            <LinearLayout
                android:weightSum="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >

                <ImageView
                    android:layout_weight="2"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_margin="15dp"
                    android:src="@drawable/addusers" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Add Users"
                    android:textSize="16sp"
                    android:layout_marginStart="15dp"
                    android:layout_marginLeft="15dp" />
            </LinearLayout>


        </androidx.cardview.widget.CardView>

        <androidx.cardview.widget.CardView
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_margin="10dp"
            android:elevation="10dp"
            app:cardCornerRadius="15dp"
            >
            <LinearLayout
                android:weightSum="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >

                <ImageView
                    android:layout_weight="2"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_margin="15dp"
                    android:src="@drawable/newspaper" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Report"
                    android:textSize="16sp"
                    android:layout_marginStart="15dp"
                    android:layout_marginLeft="15dp" />
            </LinearLayout>



        </androidx.cardview.widget.CardView>
        <androidx.cardview.widget.CardView
            android:layout_height="0dp"
            android:layout_width="0dp"
            android:layout_columnWeight="1"
            android:layout_rowWeight="1"
            android:layout_margin="10dp"
            android:elevation="10dp"
            app:cardCornerRadius="5dp"
            >
            <LinearLayout
                android:weightSum="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >

                <ImageView
                    android:layout_weight="2"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_margin="15dp"
                    android:src="@drawable/settings" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Settings"
                    android:textSize="16sp"
                    android:layout_marginStart="15dp"
                    android:layout_marginLeft="15dp" />
            </LinearLayout>


        </androidx.cardview.widget.CardView>

    </GridLayout>

你可以在这里找到完整的教程, Android Grid Layout With CardView和OnItemClickListener