Android Gallery的getView()返回错误的位置

谢谢阅读！

我使用Android Gallery和LayoutParams作为MATCH_PARENT来一次显示一个全屏图像.

这是我的代码：

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">
    <Gallery
        android:id="@+id/gallery" android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    </Gallery>
    <TextView android:id="@+id/tvShowText" android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:layout_alignParentBottom="true" />
</RelativeLayout>

HelloGallery.java

package com.android.sagar;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class HelloGallery extends Activity {

    TextView tvShowText = null;

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

        tvShowText = (TextView)findViewById(R.id.tvShowText);

        Gallery g = (Gallery) findViewById(R.id.gallery);
        g.setAdapter(new ImageAdapter(this));

        g.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView parent, View v, int position, long id) {
                Toast.makeText(HelloGallery.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });
    }

    public class ImageAdapter extends BaseAdapter {
        int mGalleryItemBackground;
        private Context mContext;

        private Integer[] mImageIds = {
                R.drawable.pic1,
                R.drawable.pic2,
                R.drawable.pic3
        };

        public ImageAdapter(Context c) {
            mContext = c;
        }

        public int getCount() {
            return mImageIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView i = new ImageView(mContext);

            tvShowText.setText("ImageCaption for Image No.: "+position);

            i.setImageResource(mImageIds[position]);
            i.setLayoutParams(new Gallery.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
            i.setScaleType(ImageView.ScaleType.FIT_XY);
            i.setBackgroundResource(mGalleryItemBackground);

            return i;
        }
    }
}

图像显示正确,但我打印的标题是一个或有时完全不同.

标签：android-gallery,android
来源： https://codeday.me/bug/20190903/1797161.html