Question

当设备大小超过5英寸时，如何以编程方式更改Gridview 'android:numColumns="2"'或如何在平板电脑上检测活动创建并设置'numColumns=3'。

感谢。

Answer 1

将numColums设置为auto_fit以显示尽可能多的列以填充可用空间。

Answer 2

在这种情况下你可以做的是为大于5英寸的设备创建两种不同的布局，在这些布局中设置屏幕空间小于5英寸的设备，你可以根据需要设置XML的列数。

Answer 3

试试这个：

       <GridView
        android:id="@+id/gridView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:numColumns="auto_fit" 
        >
        </GridView>

并在.java文件中

        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int density = metrics.densityDpi;


        int width = 0, height = 0;
        metrics = new DisplayMetrics();        
         getWindowManager().getDefaultDisplay().getMetrics(metrics);


         height = metrics.heightPixels;     
         width = metrics.widthPixels;

         if(width >480 && width <780)
         {
             setContentView(R.layout.home_student);
             gridView = (GridView) findViewById(R.id.gridView1); 

                gridView.setNumColumns(3);
               if(density <200)
               {
                   h=200;
                   w=200;
                   CustomAdapterStudent mAdapter;
                   mAdapter = new CustomAdapterStudent(this,prgmNameList, prgmImages,h,w); 
                   gridView.setAdapter(mAdapter); 
               }
               else
               {
                   h=200;
                   w=200;
                   CustomAdapterStudent mAdapter;
                   mAdapter = new CustomAdapterStudent(this,prgmNameList, prgmImages,h,w); 
                   gridView.setAdapter(mAdapter); 
               }
        }
         else if(width<=480)
         {
             setContentView(R.layout.home_student);
             gridView = (GridView) findViewById(R.id.gridView1); 

                gridView.setNumColumns(3);
                   h=150;
                   w=150;
                   CustomAdapterStudent mAdapter;
                   mAdapter = new CustomAdapterStudent(this,prgmNameList, prgmImages,h,w); 

                     gridView.setAdapter(mAdapter); 

         }

         else if(width >= 780)
         {
             setContentView(R.layout.home_student);
             gridView = (GridView) findViewById(R.id.gridView1); 

                gridView.setNumColumns(4);
               if(density <200)
               {
                   h=200;
                   w=200;
                   CustomAdapterStudent mAdapter;
                   mAdapter = new CustomAdapterStudent(this,prgmNameList, prgmImages,h,w); 
                   gridView.setAdapter(mAdapter); 
               }
               else
               {
                   h=200;
                   w=200;
                   CustomAdapterStudent mAdapter;
                   mAdapter = new CustomAdapterStudent(this,prgmNameList, prgmImages,h,w); 
                   gridView.setAdapter(mAdapter); 
               }
         }

希望这可能会对你有帮助！

Android GridView更改列号

3 个答案: