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

<?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>

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();    }  }}

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;  }}

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;  }}

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