Android开发实现ListView和adapter配合显示图片和文字列表功能示例

本文实例讲述了android开发实现listview和adapter配合显示图片和文字列表功能。分享给大家供大家参考，具体如下：

实际效果：

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<relativelayout 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"
  tools:context=".mainactivity"
  android:orientation="vertical">
    <!--使用红色得分割条-->
    <listview
      android:id="@+id/list1"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:divider="#f00"
      android:dividerheight="2px"
      android:headerdividersenabled="false">
    </listview>
    <!--用于存放和发送新的信息-->
    <linearlayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignparentbottom="true"
      android:layout_marginbottom="0dp"
      android:background="#66ffffff"
      android:orientation="vertical">
        <linearlayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical">
            <!--设置最大行数-->
            <edittext
              android:id="@+id/ifo_edit"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:hint="请输入内容"
              android:maxlines="6"
              android:textcolorhint="#c0c0c0" />
            <!--存放新的图片-->
            <imageview
              android:id="@+id/ifo_image"
              android:layout_width="130dp"
              android:layout_height="110dp"
              android:src="@drawable/addphoto" />
        </linearlayout>
        <relativelayout
          android:layout_width="wrap_content"
          android:layout_height="wrap_content">
            <!--点击取消发送消息-->
            <button
              android:id="@+id/delete"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignparentleft="true"
              android:layout_gravity="left"
              android:text="取消"
              android:textsize="16sp" />
            <!--点击发送消息-->
            <button
              android:id="@+id/send"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignparentright="true"
              android:text="发送"
              android:textsize="16sp" />
        </relativelayout>
    </linearlayout>
</relativelayout>

代码实现部分：

public class mainactivity extends appcompatactivity {
  //list表
  private list<informations> informationslist01 = new arraylist<>();
  //当前消息列表
  listview list01 ;
  //消息发送栏
  edittext edittext01 ;
  //存放图片
  imageview imageview01;
  //消息发送按钮
  button button01_send ;
  //记录数组长度
  int arr_num = 0;
  //定义一个数组
  string[] arr1 = new string[arr_num];
  //从相册获得图片
  bitmap bitmap;
  //判断返回到的activity
  private static final int image_request_code = 0;
  //图片路径
  private string path ;
  private handler handler = new handler(){
    @override
    public void handlemessage(message msg) {
      if((integer)msg.obj==0){
        imageview01.setimagebitmap(bitmap);
      }
      super.handlemessage(msg);
    }
  };
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    list01 = (listview) findviewbyid(r.id.list1);
    edittext01 = (edittext) findviewbyid(r.id.ifo_edit);
    imageview01 = (imageview) findviewbyid(r.id.ifo_image);
    button01_send = (button) findviewbyid(r.id.send);
    imageview01.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        if(contextcompat.checkselfpermission(mainactivity.this,
            manifest.permission.write_external_storage) != packagemanager.permission_granted){
          activitycompat.requestpermissions(mainactivity.this,new string[]{
              manifest.permission.write_external_storage
          },1);
        }
        intent intent = new intent(intent.action_pick,
            android.provider.mediastore.images.media.external_content_uri);
        startactivityforresult(intent, image_request_code);
      }
    });
    button01_send.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        if(((bitmapdrawable) ((imageview) imageview01).getdrawable()).getbitmap() != null
            || edittext01.gettext().tostring() != null){
          informations xiaochouyu = new informations(
              ((bitmapdrawable) ((imageview) imageview01).getdrawable()).getbitmap(),
              edittext01.gettext().tostring());
          informationslist01.add(xiaochouyu);
          essayadapter adapter = new essayadapter(mainactivity.this,
              r.layout.array_list,informationslist01);
          list01.setadapter(adapter);
          edittext01.settext("");
          imageview01.setimagebitmap(null);
          imageview01.setimageresource(r.drawable.addphoto);
        }
      }
    });
  }
  /*定义一个handler，定义延时执行的行为*/
  public void chnage(){
    new thread(){
      @override
      public void run() {
        while ( bitmap == null ){
          bitmap = bitmapfactory.decodefile(path);
          log.v("qwe","123");
        }
        message message = handler.obtainmessage();
        message.obj = 0;
        handler.sendmessage(message);
      }
    }.start();
  }
  @override
  protected void onactivityresult(int requestcode, int resultcode, intent data) {
    super.onactivityresult(requestcode, resultcode, data);
    //在相册里面选择好相片之后调回到现在的这个activity中
    switch (requestcode) {
      case image_request_code://这里的requestcode是我自己设置的，就是确定返回到那个activity的标志
        if (resultcode == result_ok) {//resultcode是setresult里面设置的code值
          try {
            uri selectedimage = data.getdata(); //获取系统返回的照片的uri
            string[] filepathcolumn = {mediastore.images.media.data};
            cursor cursor = getcontentresolver().query(selectedimage,
                filepathcolumn, null, null, null);//从系统表中查询指定uri对应的照片
            cursor.movetofirst();
            int columnindex = cursor.getcolumnindex(filepathcolumn[0]);
            path = cursor.getstring(columnindex); //获取照片路径
            cursor.close();
            bitmapfactory.options options = new bitmapfactory.options();
            options.insamplesize = 1;
            bitmap = bitmapfactory.decodefile(path,options);
            imageview01.setimagebitmap(bitmap);
            chnage();
            toast.maketext(mainactivity.this,path,toast.length_short).show();
          } catch (exception e) {
            // todo auto-generatedcatch block
            e.printstacktrace();
          }
        }
        break;
    }
  }
  @targetapi(19)
  private void handleimageomkitkat(intent data){
    string imagepath = null;
    uri uri = data.getdata();
    if (documentscontract.isdocumenturi(this,uri)){
      //如果document类型是u日，则通过document id处理
      string docid = documentscontract.getdocumentid(uri);
      if ("com.android.providers.media.documents".equals(uri.getauthority())){
        string id = docid.split(":")[1];//解析出数字格式id
        string selection = mediastore.images.media._id + "=" + id;
        imagepath = getimagepath(mediastore.images.media.external_content_uri,selection);
      }else if ("com.android.providers.downloads.documents".equals(uri.getauthority())){
        uri contenturi = contenturis.withappendedid(uri.parse("content://downloads/public_downloads"),long.valueof(docid));
        imagepath = getimagepath(contenturi,null);
      }
    }else if ("content".equalsignorecase(uri.getscheme())){
      //如果是普通类型 用普通方法处理
      imagepath = getimagepath(uri,null);
    }else if ("file".equalsignorecase(uri.getscheme())){
      //如果file类型位uri直街获取图片路径即可
      imagepath = uri.getpath();
    }
    displayimage(imagepath);
  }
  private void handleimagebeforekitkat(intent data){
    uri uri = data.getdata();
    string imagepath = getimagepath(uri,null);
    displayimage(imagepath);
  }
  private string getimagepath(uri uri, string selection){
    string path = null;
    //通过uri和selection来获取真实图片路径
    cursor cursor = getcontentresolver().query(uri, null, selection, null, null);
    if (cursor != null){
      if (cursor.movetofirst()){
        path = cursor.getstring(cursor.getcolumnindex(mediastore.images.media.data));
      }
      cursor.close();
    }
    return path;
  }
  private void displayimage(string imagepath){
    if (imagepath != null){
      bitmap bitmap = bitmapfactory.decodefile(imagepath);
      imageview01.setimagebitmap(bitmap);
    }else {
      toast.maketext(mainactivity.this,"fail to get image",toast.length_short).show();
    }
  }
}

adapter 配试器：

public class essayadapter extends arrayadapter<informations> {
  private int resourceid;
  public essayadapter(context context, int textviewresourceid,
            list<informations> objects){
    super(context, textviewresourceid, objects);
    resourceid = textviewresourceid;
  }
  @override
  public view getview(int position, view convertview, viewgroup parent) {
    informations informations = getitem(position);
    view view = layoutinflater.from(getcontext()).inflate(resourceid,parent, false);
    imageview informationimage = (imageview) view.findviewbyid(r.id.image);
    textview informationessay = (textview) view.findviewbyid(r.id.essay);
    informationimage.setimagebitmap(informations.getimagebitmap());
    informationessay.settext(informations.getessay());
    return view;
  }
}

information类：

包括 bitmap 和 essay 两个私有变量

public class informations {
  //文体
  private string essay;
  //图片
  private bitmap imageid;
  informations(bitmap imageid, string essay){
    this.imageid = imageid;
    this.essay = essay;
  }
  informations(){
    this.essay = null;
    this.imageid = null;
  }
  public string getessay() {
    return essay;
  }
  public void setessay(string essay) {
    this.essay = essay;
  }
  public bitmap getimagebitmap() {
    return imageid;
  }
  public void setimagebitmap(bitmap imageid) {
    this.imageid = imageid;
  }
}

权限：

<!--获取照片权限-->
<uses-permission android:name="android.permission.read_external_storage"/>
<uses-permission android:name="android.permission.write_external_storage" />

更多关于android相关内容感兴趣的读者可查看本站专题：《android控件用法总结》、《android开发入门与进阶教程》、《android视图view技巧总结》、《android编程之activity操作技巧总结》、《android数据库操作技巧总结》及《android资源操作技巧汇总》

希望本文所述对大家android程序设计有所帮助。