如何在android中创建带标题的水平图片列表？

Question

我想要一个水平滚动列表，其中包含一些带有标题的图片。我正在使用TwoWayView（由lucasr）库，我无法显示任何图像。如果我有任何方法在这个库中有图像，请告诉我如何做到这一点。但如果它不支持图像，请建议我一个更好的图书馆。我正在使用android studio v1.2而且我是android的新手。

Answer 1

为什么不使用androids水平滚动视图并添加图像，而不是使用库。这是一个非常粗略的例子，您应该能够构建：

在你的布局中：

<HorizontalScrollView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/horizontalScrollView"
    android:layout_above="@+id/linearLayout3"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" >
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/image_container"
        android:orientation="horizontal">

    </LinearLayout>
</HorizontalScrollView>

在你的代码中：

LinearLayout layout = (LinearLayout) view.findViewById(R.id.image_container)
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

// Add 4 images

for (int i = 0; i < 4; i++) { 
        layoutParams.setMargins(20, 20, 20, 20);
        layoutParams.gravity = Gravity.CENTER;
        ImageView imageView = new ImageView(getActivity());
        imageView.setImageResource(R.drawable.image);
        imageView.setOnClickListener(documentImageListener);
        imageView.setLayoutParams(layoutParams);

        layout.addView(imageView);

    }

就像我说的那样，非常粗糙，但希望它有所帮助！

编辑：顺便说一下布局方向应该是“水平”android：orientation =“horizo​​ntal”>

Answer 2

对于水平滚动你不必使用TwoWayView库，你可以像这样创建自定义水平布局：

<LinearLayout 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" 
    android:orientation="vertical">

    <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <LinearLayout
            android:id="@+id/mygallery"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            />
    </HorizontalScrollView>

</LinearLayout>

在onCreate（）方法中，从xml文件中获取linearLayout的id，并将动态创建的ImageView添加到linearlayout：

import java.io.File;

import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends Activity {

 LinearLayout myGallery;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myGallery = (LinearLayout)findViewById(R.id.mygallery);

        String ExternalStorageDirectoryPath = Environment
          .getExternalStorageDirectory()
          .getAbsolutePath();

        String targetPath = ExternalStorageDirectoryPath + "/test/";

        Toast.makeText(getApplicationContext(), targetPath, Toast.LENGTH_LONG).show();
        File targetDirector = new File(targetPath);

        File[] files = targetDirector.listFiles();
        for (File file : files){
         myGallery.addView(insertPhoto(file.getAbsolutePath()));
        }    
    }

    View insertPhoto(String path){
     Bitmap bm = decodeSampledBitmapFromUri(path, 220, 220);

     LinearLayout layout = new LinearLayout(getApplicationContext());
     layout.setLayoutParams(new LayoutParams(250, 250));
     layout.setGravity(Gravity.CENTER);

     ImageView imageView = new ImageView(getApplicationContext());
     imageView.setLayoutParams(new LayoutParams(220, 220));
     imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
     imageView.setImageBitmap(bm);

     layout.addView(imageView);
     return layout;
    }

    public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
     Bitmap bm = null;

     // First decode with inJustDecodeBounds=true to check dimensions
     final BitmapFactory.Options options = new BitmapFactory.Options();
     options.inJustDecodeBounds = true;
     BitmapFactory.decodeFile(path, options);

     // Calculate inSampleSize
     options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

     // Decode bitmap with inSampleSize set
     options.inJustDecodeBounds = false;
     bm = BitmapFactory.decodeFile(path, options); 

     return bm;  
    }

    public int calculateInSampleSize(

     BitmapFactory.Options options, int reqWidth, int reqHeight) {
     // Raw height and width of image
     final int height = options.outHeight;
     final int width = options.outWidth;
     int inSampleSize = 1;

     if (height > reqHeight || width > reqWidth) {
      if (width > height) {
       inSampleSize = Math.round((float)height / (float)reqHeight);   
      } else {
       inSampleSize = Math.round((float)width / (float)reqWidth);   
      }   
     }

     return inSampleSize;   
    }

}

Answer 3

如果您的目标是以水平方式显示图像列表，则最好使用Horizo​​ntal ListView。检查以下链接 -

Horizontal ListView

看看，它正是你想要的图像+文字

Answer 4

LinearLayout layout =（LinearLayout）findViewById（R.id.image_container）; LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams（LinearLayout.LayoutParams.WRAP_CONTENT，LinearLayout.LayoutParams.WRAP_CONTENT）;

//添加4张图片

    for (int i = 0; i < 4; i++) {
        layoutParams.setMargins(20, 20, 20, 20);
        layoutParams.gravity = Gravity.CENTER;
        ImageView imageView = new ImageView(this);
        imageView.setImageResource(R.drawable.bouton_admin);
        //imageView.setOnClickListener(documentImageListener);
        imageView.setLayoutParams(layoutParams);
        layout.addView(imageView);

    }