Android的 - 如何做图像选取框 [英] Android - How to do Marquee of images

问题描述

我是新来的Andr​​oid程序，现在我想将水平scrolview内部的图像。

I am new to android Programming, now i am trying to place images inside the horizontal scrolview.

其实我所要做的是，我想显示阵列图像需要被从右到左自动滚动。

Actually what i am trying to do is , i want to display array of images which needs to be scrolling automatically from right to left.

到目前为止，我已经试过如下

So far i have tried as below

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <ImageView 
        android:id="@+id/image2"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:src="@drawable/icon"
        android:layout_centerHorizontal="true"
        android:layout_marginRight="5px"/>
</LinearLayout>
</HorizontalScroll>

活动文件 -

package com.myhorizontalScroll;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ImageView;

public class MyHorizontalScrollActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // declare a class field:
            final Handler h = new Handler();

            // later:
            final ImageView scroll=(ImageView)findViewById(R.id.image2);
            Thread t = new Thread(){
                public void run(){
                    int y = scroll.getScrollY();
                    int x = scroll.getScrollX();

                    while(y<1600){
                        // need final values to create anonymous inner class
                        final int X = x;
                        final int Y = y;
                        h.post(new Runnable() {
                            public void run() {
                                scroll.scrollTo(X, Y);
                            }
                        });
                        x++;
                        try {
                            sleep(1000/12);
                        } catch (InterruptedException e) {
                        }
                    }
                }
            };
            t.start();
    }
}

现在ImageView的推移从左到左。所述imageview的实际定位在左侧。

Now the imageview goes from left to left. the imageview actually positioned in the left side .

请帮我如何放置在右侧的ImageView的，我想这个滚动需要连续进行。

please help me out how to place the imageview in right side and i want this scrolling needs to done continuously.

请帮我如何我可以继续说。

Please help me out how i can proceed with that.

推荐答案

这是我如何做到这一点，在我的应用程序之一。这本质上是用来显示用户的个人资料图片谁喜欢一个职位。你自然会要弄清楚一点为自己，但我会尽力帮助在那里我可以。

This is how I do it in one of my apps. This is essentially used to display the Profile Pictures of User's who like a post. You will naturally have to figure out a bit for yourself, but I will try and help where I can.

一，XML：

<LinearLayout
    android:id="@+id/linlaLikesStrip"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:visibility="gone" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="2dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="5dp"
        android:text="LIKES BY:"
        android:textColor="#888888"
        android:textSize="14sp"
        android:textStyle="bold" >
    </TextView>

    <HorizontalScrollView
        android:id="@+id/horscoLikes"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:fillViewport="true"
        android:overScrollMode="never"
        android:scrollbars="none" >

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

在我的Java code，我宣布和全球扮演他们，所以你必须做一些搞清楚。

In my Java code, I declare and cast them globally, so you will have to do a little figuring out.

Java的code：

The JAVA Code:

linlaLikes.removeAllViews();

for (int i = 0; i < arrLikes.size(); i++) {

    final getLikes newLikes = arrLikes.get(i);

    ImageView imgUsers = new ImageView(FeedDetails.this);

    // SET THE IMAGEVIEW DIMENSIONS
    int dimens = 45;
    float density = getResources().getDisplayMetrics().density;
    int finalDimens = (int)(dimens * density);

    LinearLayout.LayoutParams imgvwDimens = new LinearLayout.LayoutParams(finalDimens, finalDimens);
    imgUsers.setLayoutParams(imgvwDimens);

    // SET SCALETYPE
    imgUsers.setScaleType(ScaleType.CENTER_CROP);

    // SET THE MARGIN
    int dimensMargin = 4;
    float densityMargin = getResources().getDisplayMetrics().density;
    int finalDimensMargin = (int)(dimensMargin * densityMargin);

    LinearLayout.LayoutParams imgvwMargin = new LinearLayout.LayoutParams(finalDimens, finalDimens);
    imgvwMargin.setMargins(finalDimensMargin, finalDimensMargin, finalDimensMargin, finalDimensMargin);

    // SET PADDING
//              imgUsers.setPadding(finalDimensMargin, finalDimensMargin, finalDimensMargin, finalDimensMargin);

    // DISPLAY THE IMAGES USING THE PROFILELOADER CLASS
    proLoader.DisplayImage(newLikes.getUserProfilePicture(), imgUsers);

    // ADD THE NEW IMAGEVIEW WITH THE PROFILE PICTURE LOADED TO THE LINEARLAYOUT
    linlaLikes.addView(imgUsers, imgvwMargin);

    imgUsers.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent showProfile = new Intent(getApplicationContext(), WallPost.class);
            showProfile.putExtra("USER_ID", newLikes.getUserID());
            showProfile.putExtra("USER_PROFILE", "USER_PROFILE");
            startActivity(showProfile);
        }
    });
}

这一点解释：

1. arrLikes 是的ArrayList 持有该头像的。我用 arrLikes.size（）在循环，以获得正确的数字。
2. 代替硬编码ImageViews（显然，因为所需要的数量是未知的），在XML中，我动态地创建在运行时所需的数量。
3. 然后遵循了很多东西用于设置 ImageViews 的大小，然后在它们之间设置保证金
4. 最后，我正在使用@费多尔的延迟加载，以显示我的照片在新创建 ImageViews 。

1. arrLikes is an ArrayList that holds the Profile Picture's. I use arrLikes.size() in the for loop to get the correct number.
2. Instead of hard-coding ImageViews (obviously, because the number needed is unknown) in the XML, I dynamically create the necessary number at run-time.
3. Then follows a lot of stuff for setting up the size of the ImageViews and then setting the Margin between them.
4. And finally, I am using @Fedor's Lazy Loading to display the Profile Pictures in the newly created ImageViews.

希望这有助于。并随时问，如果你有任何困难，上述任何一项。

Hope this helps. And feel free to ask if you have any difficulties with any of the above.

这篇关于Android的 - 如何做图像选取框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！