Question

安卓开发GridLayout设计计算器界面显示不全

public class GridLayoutTest extends Activity{ GridLayout gridLayout; String[] chars=new String[]{ "7","8","9","÷", "4","5","6","×", "1","2","3","-", ".","0","=","+" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.grid_larout); gridLayout=(GridLayout)findViewById(R.id.root); for(int i=0;i<chars.length;i++){ Button bn=new Button(this); bn.setText(chars[i]); bn.setTextSize(40); GridLayout.Spec rowSpec=GridLayout.spec(i/4+2); GridLayout.Spec columnSpec=GridLayout.spec(i % 4); String msg="row:"+(i/4+2)+" col:"+(i%4); Log.e("tag",msg); GridLayout.LayoutParams params=new GridLayout.LayoutParams(rowSpec,columnSpec); // params.setGravity(Gravity.FILL); gridLayout.addView(bn,params); } }

Answer 1

这个我刚才才写过，然后设置字体的地方有一点小问题，我贴上我的代码你看一下

package com.huangjun.brioal.caculatorui;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.GridLayout;


public class MainActivity extends ActionBarActivity {
   private String[] chars = new String[] {
         "7", "8", "9", "/",
         "4", "5", "6", "*",
         "1", "2", "3", "-",
         "0", ".", "=", "+"
   };
   private GridLayout gridLayout;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      gridLayout = (GridLayout) findViewById(R.id.root);
      for (int i = 0; i < chars.length; i++) {
         Button btn = new Button(this);
         btn.setText(chars[ i ]);
         btn.setTextSize(80);
//       指定所在的行
         GridLayout.Spec row = GridLayout.spec(i / 4 + 2);
//       指定所在的列
         GridLayout.Spec column = GridLayout.spec(i % 4);

         GridLayout.LayoutParams params = new GridLayout.LayoutParams(row, column);
//       指定填满父容器
         params.setGravity(Gravity.FILL);
//       添加按钮
         gridLayout.addView(btn,params);
      }
   }、
   }
  顶上的我的截图，有一点字体大小小问题但是不想弄了

Answer 2

　　布局代码是怎样的，在真机上是否正常

追问

追答

其实指定了 columnCount 和 rowCount 就可以了,没必要再设置 LayoutParams 了 

Answer 3

这跟你的xml文件有关，贴出来看看

Answer 4

安卓开发GridLayout设计计算器界面显示不全这个没有关系。

Answer 5

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xys.myapplication/com.xys.myapplication.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.GridLayout.addView(android.view.View, android.view.ViewGroup$LayoutParams)' on a null object reference