Android 自定义View-----流式布局(粗糙实现)

//首先查看一下布局界面吧

<?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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/ed_text"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" />

        <Button
            android:id="@+id/add"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="添加" />
    </LinearLayout>
    <soexample.umeng.com.liushibuju.MyViewLS
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/selfView"></soexample.umeng.com.liushibuju.MyViewLS>
</LinearLayout>

//很简单一个输入框 一个按钮

//MainActivity界面

//寻找控件啥的就不说了

package soexample.umeng.com.liushibuju;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private EditText td_text;
    private ArrayList<String> list = new ArrayList<>(  );
    private MyViewLS self;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );
        td_text = findViewById( R.id.ed_text );
        self = findViewById( R.id.selfView );
        findViewById( R.id.add ).setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String trim = td_text.getText().toString().trim();
                if (TextUtils.isEmpty( trim )){
                    Toast.makeText( MainActivity.this, "内容不可为空", Toast.LENGTH_SHORT ).show();
                }
                list.add( trim );
//这里要传一个存放输入的值的集合
                self.setListData(list);
            }
        } );
    }
}

//自定义控件的类

package soexample.umeng.com.liushibuju;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;
/*
   流式布局
   继承RelativeLayout
   实现三个构造方法
* */
public class MyViewLS extends RelativeLayout {
    private List<String> listData;
    private LinearLayout view_v;
    private LinearLayout view_h;
    private TextView textView;
    private View view1;
    private String data;
    private int position = 0;

    public MyViewLS(Context context) {
        super( context );
        init( context );
    }

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

    public MyViewLS(Context context, AttributeSet attrs, int defStyleAttr) {
        super( context, attrs, defStyleAttr );
        init( context );
    }

    private Context context;

    private void init(Context context) {
        this.context = context;
        //在init方法里面找到垂直的布局  记得强转为LinearLayout
        view_v = (LinearLayout) View.inflate( context, R.layout.layout_v, null );
        //把垂直的布局添加到布局里面
        addView( view_v );
    }

    private void setlist() {
        //记得清空控件
        view_v.removeAllViews();
        view_h = (LinearLayout) View.inflate( context, R.layout.layout_h, null );
        //找到水平的布局 添加到垂直的布局里面
        view_v.addView( view_h );
        view_h.removeAllViews();
        //记得清空
        int len = 0;
        for (int i = 0; i < listData.size(); i++) {
            position = i;
            data = listData.get( i );
            len += data.length();
            if (len > 28) {
                view_h = (LinearLayout) View.inflate( context, R.layout.layout_h, null );
                view_v.addView( view_h );
                len = 0;
            }
            view1 = View.inflate( context, R.layout.layout_text, null );
            textView = view1.findViewById( R.id.text_name );
            textView.setText( data );
            view_h.addView( view1 );
            //长按删除
            textView.setOnLongClickListener(new OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    view_v.removeView(view1);
                    listData.remove(position);
                    setlist();
                    return true;
                }
            });
        }

        /*textView.setOnClickListener( new OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText( context, textView.getText().toString().trim(), Toast.LENGTH_SHORT ).show();
            }
        } );*/
    }

    public void setListData(ArrayList<String> listData) {
        this.listData = listData;
        if (!listData.isEmpty()) {
            setlist();
        }
    }


}

//三个布局 逐次添加

//水平布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="horizontal"
    android:layout_height="match_parent">

</LinearLayout>

//垂直布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

</LinearLayout>

//文字布局 

//文字的布局宽度记得改为match_parent

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:background="@drawable/shape"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/text_name"/>
</LinearLayout>