如何避免在android中的relativelayout中重叠视图

Posted 2023-02-26

【中文标题】如何避免在android中的relativelayout中重叠视图

【英文标题】：how to avoid overlapping views inside relativelayout in android

【发布时间】：2014-09-18 06:03:12

【问题描述】：

我在 android 中动态生成视图时遇到了这个问题。 我有相对布局，在里面我正在生成动态视图。但这仅重叠第一个和第二个视图。我搜索并尝试了更多。任何人都可以帮我解决这个问题。谢谢。这是我尝试过的代码。 动态数据适配器.java 包 com.Nithya.dynamiclist;

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;

public class Dynamicdataadapter extends BaseAdapter 


    Context context;
    ArrayList<String> data; 
    int layoutid;   
    RelativeLayout itemlayout;
    ArrayList<Integer> textviewsize = new ArrayList<Integer>();
    ArrayList<Integer> buttonsize = new ArrayList<Integer>();


    public Dynamicdataadapter(Context context,ArrayList<String> datas, int childlayout) 

        this.context = context;     
        this.data = datas;      
        this.layoutid = childlayout;        
        textviewsize.add(2);
        textviewsize.add(5);
        textviewsize.add(3);

    

    @Override
    public int getCount() 

        return data.size();
    

    @Override
    public Object getItem(int position) 

        return position;
    

    @Override
    public long getItemId(int position) 

        return position;
    

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 

        View row = convertView ;

        Object[] textObjects = textviewsize.toArray();  

        if(row == null) 

            LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            row = inflater.inflate(layoutid, parent, false);

            itemlayout = (RelativeLayout)row.findViewById(R.id.itemlayout); 


            for(int room = 0 ; room < data.size() ; room++)        

                if(position == room) 

                TextView[] textview = new TextView[(Integer)textObjects[room]]; 

                int previousid = 0;

                int currentid = 0;

                RelativeLayout rl = new RelativeLayout(context);

                rl.setId(123456);

                RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                        LayoutParams.WRAP_CONTENT);


                lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);

                rl.setLayoutParams(lp);

                for(int i =0 ; i < textview.length;i++) 

                    currentid = previousid + 1;

                    textview[i] = new TextView(context);

                    textview[i].setId(i);

                    textview[i].setText("text"+i);  

                    RelativeLayout.LayoutParams lp_btn1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);                     

                    lp_btn1.addRule(RelativeLayout.RIGHT_OF,(textview[i].getId()-1));

                    /*if(i > 0) 
                    lp_btn1.addRule(RelativeLayout.RIGHT_OF,previousid);    
                    */

                    textview[i].setLayoutParams(lp_btn1);
                    //textview[i].setPadding(0, 0, 10, 0);
                    rl.addView(textview[i]);

                    previousid = currentid;
                

                 itemlayout.addView(rl);             


            

    
       
return row;

MainActivity.java

    package com.Nithya.dynamiclist;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

import android.support.v7.app.ActionBarActivity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;

public class MainActivity extends ActionBarActivity 

    ListView dynamiclistview;
    ArrayList<String> datas;
    ArrayList<String> datalist;
    @Override
    protected void onCreate(Bundle savedInstanceState) 

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        dynamiclistview = (ListView)findViewById(R.id.dynamiclistview);

        datas = new ArrayList<String>();

        datalist = new ArrayList<String>();

        datas.add("abc");
        datas.add("efg");
        datas.add("hij");




        Dynamicdataadapter dynamicadapter = new Dynamicdataadapter(this,datas,R.layout.childlayout);

        dynamiclistview.setAdapter(dynamicadapter);

        readdatafromassests();

    


    public void readdatafromassests() 

        AssetManager assetmanager = getAssets();

        try 
            BufferedReader bufferedreader = new BufferedReader(

                    new InputStreamReader(assetmanager.open("datasheet")));

            String readline ;

            StringBuilder builder = new StringBuilder();

            while((readline = bufferedreader.readLine()) != null) 

                Log.d("datas", ""+readline);


                if(readline.contains("Textview")) 

                    Log.d("datasheet datas", ""+readline);
                
                builder.append(readline);
            

            String datasheet = builder.toString();




         catch (IOException e) 
            // TODO Auto-generated catch block
            e.printStackTrace();
        



    
    @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;
    

    @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();
        if (id == R.id.action_settings) 
            return true;
        
        return super.onOptionsItemSelected(item);
    

【参考方案1】：

使用 LinerLayout 代替 RelaytiveLayout

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 

        View row = convertView ;

        Object[] textObjects = textviewsize.toArray();  

        if(row == null) 

            LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            row = inflater.inflate(layoutid, parent, false);

            itemlayout = (LinearLayout)row.findViewById(R.id.itemlayout); 


            for(int room = 0 ; room < data.size() ; room++)        

                if(position == room) 

                    TextView[] textview = new TextView[(Integer)textObjects[room]]; 

                    int previousid = 0;

                    int currentid = 0;

                    LinearLayout rl = new LinearLayout(context);

                    rl.setId(123456);

                    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                            LayoutParams.WRAP_CONTENT);
                    lp.setLayoutDirection(LinearLayout.HORIZONTAL);

                    rl.setLayoutParams(lp);

                    for(int i =0 ; i < textview.length;i++) 

                        currentid = previousid + 1;

                        textview[i] = new TextView(context);

                        textview[i].setId(i);

                        textview[i].setText("text"+i);  

                        LinearLayout.LayoutParams lp_btn1 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);                     
                        lp_btn1.setLayoutDirection(LinearLayout.HORIZONTAL);

                        //lp_btn1.addRule(RelativeLayout.RIGHT_OF,(textview[i].getId()-1));

                        /*if(i > 0) 
                    lp_btn1.addRule(RelativeLayout.RIGHT_OF,previousid);    
                    */

                        textview[i].setLayoutParams(lp_btn1);
                        //textview[i].setPadding(0, 0, 10, 0);
                        rl.addView(textview[i]);

                        previousid = currentid;
                    

                    itemlayout.addView(rl);             


                

            
               
        return row;
    

【参考方案2】：

不确定是否是问题所在，但您在这里使用了否定的 id：

// first iteration i == 0

// setId(0)
textview[i].setId(i);

// RelativeLayout.RIGHT_OF, -1
lp_btn1.addRule(RelativeLayout.RIGHT_OF,(textview[i].getId()-1));

id为-1的TextView不存在。