GridView的填充，verticalSpacing和horizo​​ntalSpacing只是不會減少

Question

我想創建一個按鈕的網格。爲了顯示一個GridLayout的分隔符，我已經將我的GridLayout的背景設置爲黑色&然後我嘗試了放置我的按鈕。我是網格中的分隔線，但由於某種原因，我無法控制它們的厚度。

我曾嘗試將verticalSpacing和horizontalSpacing設置爲0.1，但仍然沒有用。它只是不會下降，我最終得到以下

以下是我content_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" 
    tools:context="accordiontry.juspay.accordiontry.MainActivity" 
    tools:showIn="@layout/activity_main" 
    android:orientation="vertical"> 

    <GridView 
     android:id="@+id/gridView" 
     android:padding="0dp" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:background="@android:color/black" 
     android:stretchMode="columnWidth" 
     android:gravity="fill_horizontal" 
     android:numColumns="2" 
     android:verticalSpacing=".05dp" 
     android:horizontalSpacing="0.1dp"> 
    </GridView> 
</LinearLayout> 

以下是按鈕的佈局，cell_layout.xml

<Button 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:id="@+id/button" 
    xmlns:android="http://schemas.android.com/apk/res/android" /> 

以下是自定義網格ada PTER，GridAdapter.java

import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Button; 

/** 
* Created by stpl on 27/7/16. 
*/ 
public class GridAdapter extends BaseAdapter { 

    private Context context; 
    private String[] names; 

    public GridAdapter(Context context, String[] names) 
    { 
     this.context = context; 
     this.names = names; 
    } 

    @Override 
    public int getCount() { 
     return names.length; 
    } 

    @Override 
    public Object getItem(int i) { 
     return null; 
    } 

    @Override 
    public long getItemId(int i) { 
     return 0; 
    } 

    @Override 
    public View getView(int i, View view, ViewGroup viewGroup) 
    { 
     View cell; 
     LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE); 

      cell = inflater.inflate(R.layout.cell_layout,null); 
      Button btn = (Button) cell.findViewById(R.id.button); 
      btn.setText("BUTTON "+ names[i]); 


     return cell; 

    } 
} 

最後，以下是我的MainActivity.java

import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Path; 
import android.graphics.Typeface; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.GridLayoutManager; 
import android.support.v7.widget.Toolbar; 
import android.view.Gravity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.ViewGroup; 
import android.view.animation.Animation; 
import android.view.animation.LinearInterpolator; 
import android.view.animation.RotateAnimation; 
import android.webkit.WebView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.GridLayout; 
import android.widget.GridView; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity { 

    private GridView gridView; 
    private final int NumOfCol = 2; 
    private final int NumOfRows = 2; 

    private String[] names = {"BUTTON1", "BUTTON2", "BUTTON3", "BUTTON4"}; 

    private GridAdapter gridAdapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     init(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    public void init() 
    { 
     gridView = (GridView) findViewById(R.id.gridView); 

     gridAdapter = new GridAdapter(this, names); 

     gridView.setAdapter(gridAdapter); 

    } 



} 

我不知道我要去哪裏錯了。請幫忙。

謝謝你的時間！

Answer 1

按鈕通常有自己的內置頁邊距來自用作按鈕背景的可繪製頁面。解決這個問題

一種方法是對保證金指定負值：

<Button 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/button" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_margin="-2dp" /> 

更好的方法是創建不具有任何餘量定義和使用的按鈕繪製你的按鈕背景。例如，這裏是從程序兼容性庫按鈕背景繪製（這個人是前棒棒堂和不顯示紋波）：

<inset xmlns:android="http://schemas.android.com/apk/res/android" 
     android:insetLeft="@dimen/abc_button_inset_horizontal_material" 
     android:insetTop="@dimen/abc_button_inset_vertical_material" 
     android:insetRight="@dimen/abc_button_inset_horizontal_material" 
     android:insetBottom="@dimen/abc_button_inset_vertical_material"> 
    <shape android:shape="rectangle"> 
     <corners android:radius="@dimen/abc_control_corner_material" /> 
     <solid android:color="@android:color/white" /> 
     <padding android:left="@dimen/abc_button_padding_horizontal_material" 
       android:top="@dimen/abc_button_padding_vertical_material" 
       android:right="@dimen/abc_button_padding_horizontal_material" 
       android:bottom="@dimen/abc_button_padding_vertical_material" /> 
    </shape> 
</inset> 

那些插圖是這是給你的悲傷的一部分。只需爲無按鈕背景的按鈕背景定義另一個可繪製對象。