将按钮高度设置为等于按钮宽度

本文介绍了将按钮高度设置为等于按钮宽度的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经在互联网上看到很多这个问题，但是所有解决方案都不适合我.

I've seen this question a lot on the internet, but all solutions didn't work for me..

所以这就是问题所在.我想要一个屏幕宽度为50％的按钮(效果很好).

So this is the problem. I want a button that has 50% width of the screen (that works fine).

但是现在我希望它的高度和宽度相同.

But now I want it to have the same height the as the width.

这不起作用:

Button button1 = (Button) findViewById(R.id.button1); int btnSize = button1.getLayoutParams().width; button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize));

查看以下代码:

Activity1.java:

Activity1.java:

package nl.jesse.project1; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.widget.Button; import android.widget.LinearLayout; public class Activity1 extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_activity1); Button button1 = (Button) findViewById(R.id.button1); int btnSize = button1.getLayoutParams().width; System.out.println(btnSize); //button1.setLayoutParams(new LinearLayout.LayoutParams(btnSize, btnSize)); } @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_activity1, 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); } }

Activity_activity1.xml:

Activity_activity1.xml:

<LinearLayout xmlns:android="schemas.android/apk/res/android" xmlns:tools="schemas.android/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".Activity1" android:weightSum="1.0" > <Button android:layout_height="wrap_content" android:layout_weight=".5" android:layout_width="0dip" android:text="@string/button1" android:id="@+id/button1" /> </LinearLayout>

我已经尝试过此方法及其部分内容，但没有成功.

I've already tried this and parts of it, without success.

• >如何设置相同的宽度和高度按钮
• ImageView-是否具有高度匹配的宽度?
• 在ToggleButton上设置与宽度相同的高度
• 布局宽度等于高度

• How to set same width and height of a button
• ImageView - have height match width?
• Set same height as width at a ToggleButton
• Layout width equal height

那我在做什么错了?

推荐答案

好吧，我知道这可能不是最有效的方法，但是可以保证工作.

Ok I know this may not be the most efficient way to do it, but it is guaranteed to work.

您创建此ResizableButton类:

import android.content.Context; import android.util.AttributeSet; import android.widget.Button; public class ResizableButton extends Button { public ResizableButton(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); setMeasuredDimension(width, width); } }

，然后在您的Activity_activity1.xml上放置:

and on your Activity_activity1.xml, you put :

<LinearLayout xmlns:android="schemas.android/apk/res/android" xmlns:tools="schemas.android/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:weightSum="1.0" tools:context=".Activity1"> <com.example.stackoverflow.ResizableButton android:id="@+id/button1" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight=".5" android:text="Test" /> </LinearLayout>

然后，您将拥有一个始终具有与宽度相同的高度的按钮，并且如果您想使用该按钮，则在您的主要活动中，您将必须要缩放一个ResizableButton对象而不是一个Button.含义:

Then you have a button that always has the same height as width and if you want to play with the button, on your main activity you will have to decalre a ResizableButton object and not a Button. Meaning :

ResizableButton button1 = (ResizableButton) findViewById(R.id.button1);

还有Voilà.