Question

我想按下按钮背景及其文字颜色。

请检查我的以下项目并告诉我你的建议......

这是我的 MainActivity.java

package com.example.dynamicbutton;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    LinearLayout myLayout = (LinearLayout) findViewById(R.id.layout);
    myLayout.setPadding(0, 10, 0, 30);
    Button[] btn = new Button[5];
    for(int i=0; i<5; i++)
    {
        btn[i] = new Button(this);
        btn[i].setId(i);
        btn[i].setText("Dynamic Button" + i);
        btn[i].setPadding(5, 5, 5, 5);
        btn[i].setTextSize(15);
        if (i % 2 == 0)
                    {
                         btn[i].setBackgroundResource(R.drawable.bluebutton_background);
            btn[i].setTextColor(getResources().getColor(R.drawable.blue_text_color));

                    }
        else{
            btn[i].setBackgroundResource(R.drawable.graybutton_background);
            btn[i].setTextColor(getResources().getColor(R.drawable.gray_text_color));

        }
        myLayout.addView(btn[i]);

    }
}

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

}

和 activity_main.xml （布局）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
tools:context=".MainActivity" >

<LinearLayout
    android:id="@+id/layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#FFFFFF"
    android:orientation="vertical" >

</LinearLayout>

</LinearLayout>

和 Drawables：

bluebutton_background.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item 
        android:state_focused="true" 
        android:drawable="@drawable/orangebutton"
        />
    <item 
        android:state_pressed="true" 
        android:drawable="@drawable/orangebutton"
        />
    <item android:drawable="@drawable/bluebutton"/>

</selector>

graybutton_background.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_focused="true" android:drawable="@drawable/orangebutton"/>
    <item android:state_pressed="true" android:drawable="@drawable/orangebutton"/>
    <item android:drawable="@drawable/graybutton"/>

</selector>

gray_text_color.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_focused="true" android:color="#f4f4f4"/>
    <item android:state_pressed="true" android:color="#242425"/>
    <item android:color="#f4f4f4"/>

</selector>

blue_text_color.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_focused="true" android:color="#242425"/>
    <item android:state_pressed="true" android:color="#242425"/>
    <item android:color="#242425"/>

</selector>

最诚挚的问候

Answer 1

您可以使用onClickListener（）方法。

尝试以下步骤：

将您的按钮数组声明为

final Button [] btn = new Button [5];
在for循环中声明一个最终的int j

final int j = i;

将以下代码放在for循环中的if else部分之后

btn [i] .setOnClickListener（new OnClickListener（）{

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            if(btn[j].getTextColors().getDefaultColor() == Color.parseColor("#242425")){
                btn[j].setTextColor(getResources().getColor(R.drawable.gray_text_color));
                btn[i].setBackgroundResource(R.drawable.graybutton_background);
            } else {
                btn[j].setTextColor(getResources().getColor(R.drawable.blue_text_color));
                btn[i].setBackgroundResource(R.drawable.bluebutton_background);
            }
        }
    });

最终代码如下：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    LinearLayout myLayout = (LinearLayout) findViewById(R.id.layout);
    myLayout.setPadding(0, 10, 0, 30);
    final Button[] btn = new Button[5];                                   // 1
    for(int i=0; i<5; i++)
    {
        final int j = i;                                                  // 2
        btn[i] = new Button(this);
        btn[i].setId(i);
        btn[i].setText("Dynamic Button" + i);
        btn[i].setPadding(5, 5, 5, 5);
        btn[i].setTextSize(15);
        if (i % 2 == 0)
                    {
                         btn[i].setBackgroundResource(R.drawable.bluebutton_background);
            btn[i].setTextColor(getResources().getColor(R.drawable.blue_text_color));

                    }
        else{
            btn[i].setBackgroundResource(R.drawable.graybutton_background);
            btn[i].setTextColor(getResources().getColor(R.drawable.gray_text_color));

        }
        myLayout.addView(btn[i]);

    }

    btn[i].setOnClickListener(new OnClickListener() {                     // 3

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                if(btn[j].getTextColors().getDefaultColor() == Color.parseColor("#242425")){
                    btn[j].setTextColor(getResources().getColor(R.drawable.gray_text_color));
                    btn[i].setBackgroundResource(R.drawable.graybutton_background);
                } else {
                    btn[j].setTextColor(getResources().getColor(R.drawable.blue_text_color));
                    btn[i].setBackgroundResource(R.drawable.bluebutton_background);
                }
            }
        });
}

Answer 2

我在图片中解释了我的意思。

Dynamic_Button_Image

我将需要我的按钮 background_image 和 textColor 一起更改。

我使用选择器标记用于 background_image 。

此外，当我按下按钮时，我使用选择器标记更改 textColor 。

当我按下我的按钮时， background_image 会发生变化，但 textColor 只会提供默认值

.xml 文件的值（ blue_text_color.xml 或 gray_text_color.xml ）

同时更改按钮的背景和文本颜色

2 个答案: