Android 流式布局 RadioGroup

jopen 9年前發布 | 2K 次閱讀 Java Android

1.使用方法 

package com.example.radiogroup;

import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.ViewGroup.LayoutParams;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends Activity {

    private SelfRadioGroup mRadioLayout;
    private List<String> mSelectDataList;
    private RadioButton radioButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRadioLayout = (SelfRadioGroup) findViewById(R.id.items_parent_Single);
        initList();
        //根據內容的數量添加RadioButton
        for (int i = 0; i < mSelectDataList.size(); i++) {
            radioButton = new RadioButton(this);
            radioButton.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            radioButton.setTextColor(Color.BLACK);
            radioButton.setText(mSelectDataList.get(i));
            mRadioLayout.addView(radioButton);
        }
        mRadioLayout.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                int id = group.getCheckedRadioButtonId();
                RadioButton by = (RadioButton) findViewById(id);
                System.out.println("選擇的內容:"+by.getText());
            }
        });
    }

    /**
     * 獲取RadioButton內容
     */
    private void initList() {
        mSelectDataList = new ArrayList<String>();
        mSelectDataList.add("批發了貸款");
        mSelectDataList.add("部件");
        mSelectDataList.add("文明行政村");
        mSelectDataList.add("單位綜合檢查");
        mSelectDataList.add("單位");
        mSelectDataList.add("事件");
        mSelectDataList.add("門前三包");
        mSelectDataList.add("批發了貸款");
        mSelectDataList.add("批發");
    }
}



 
 
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" 
    android:scrollbars="none">

    <com.example.radiogroup.SelfRadioGroup
        android:id="@+id/items_parent_Single"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:visibility="visible" />

</ScrollView>
 
 
 2.自定義RadioGroup 
 
 
 
  
package com.example.radiogroup;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RadioGroup;

/**
 * 自定義RadioGroup
 * @author ZhangZhaoCheng
 */
public class SelfRadioGroup extends RadioGroup {
    private Context mContext;

    public SelfRadioGroup(Context context) {
        super(context);
        mContext = context;
    }

    public SelfRadioGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int height = 0;
        int width = 0;
        int rows = 0;
        /**
         * 獲得此ViewGroup上級容器為其推薦的寬和高，以及計算模式
         */
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
        int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
        // 計算出所有的childView的寬和高
        measureChildren(widthMeasureSpec, heightMeasureSpec);

        for (int index = 0; index < getChildCount(); index++) {
            final View child = this.getChildAt(index);
            width += child.getMeasuredWidth();
            if (rows == 0) {
                height = Math.max(height, child.getMeasuredHeight());
            }
            //如果數據的寬度大于整個屏幕的寬度 row行數++ 
            if (width > sizeWidth) {
                rows++;
                height += child.getMeasuredHeight();
                width = child.getMeasuredWidth();
            }
        }
        setMeasuredDimension(sizeWidth, height);
    }

    @Override
    protected void onLayout(boolean arg0, int left, int top, int right,
            int bottom) {
        final int count = getChildCount();
        int width = left;
        int height = top;
        int row = 0;
        int lastBottom = 0;
        for (int i = 0; i < count; i++) {
            final View child = this.getChildAt(i);
            int childWidth = child.getMeasuredWidth();
            int childHeight = child.getMeasuredHeight();
            int cl = 0, ct = 0, cr = 0, cb = 0;
            width += childWidth;
            if (row == 0) {
                height = childHeight;
            }
            if (width > right) {
                width = left + childWidth;
                height = lastBottom + childHeight;
                row++;
            }
            cl = width - childWidth;
            ct = height - childHeight;
            cr = width;
            cb = height;
            child.layout(cl, ct, cr, cb);
            lastBottom = cb;
        }
    }
}

 
  
 
  
 
 
 

                    

                    

                        
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