这周利用休息时间又学习了Gallery，然后随便写了一个图片浏览的东东。
首先看一下界面：
点击下面的图片，在上面相应的显示出来。
代码如下：
View Code
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ImageView android:id="@+id/imageView" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/star_red" android:scaleType="matrix" android:layout_weight="4" /> <Gallery android:id="@+id/gallery" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" android:spacing="5dp" > </Gallery> </LinearLayout>
View Code
1 package com.example.griview; 2 3 import javax.xml.parsers.SAXParser; 4 import javax.xml.parsers.SAXParserFactory; 5 6 import org.xml.sax.helpers.DefaultHandler; 7 import org.xmlpull.v1.XmlSerializer; 8 9 import android.os.Bundle; 10 import android.app.Activity; 11 import android.app.ActivityManager; 12 import android.content.Context; 13 import android.view.Menu; 14 import android.view.View; 15 import android.view.ViewGroup; 16 import android.view.ViewGroup.LayoutParams; 17 import android.widget.AdapterView; 18 import android.widget.AdapterView.OnItemClickListener; 19 import android.widget.BaseAdapter; 20 import android.widget.Gallery; 21 import android.widget.GridView; 22 import android.widget.ImageView; 23 import android.widget.Toast; 24 25 public class MainActivity extends Activity { 26 27 private Gallery gallery; 28 private ImageView imageView; 29 protected void onCreate(Bundle savedInstanceState) { 30 super.onCreate(savedInstanceState); 31 setContentView(R.layout.relative); 32 gallery=(Gallery) findViewById(R.id.gallery); 33 imageView=(ImageView) findViewById(R.id.imageView); 34 gallery.setAdapter(new ImageAdapter(this)); 35 36 gallery.setOnItemClickListener(new OnItemClickListener() { 37 38 public void onItemClick(AdapterView<?> parent, View view, int position, 39 long id) { 40 imageView.setBackgroundResource(mThumbIds[position]); 41 //弹出单击的GridView元素的位置 42 Toast.makeText(MainActivity.this, mThumbIds[position], Toast.LENGTH_LONG).show(); 43 } 44 45 46 }); 47 48 } 49 50 public class ImageAdapter extends BaseAdapter{ 51 52 private Context mContext; 53 //声明ImageAdapter 54 public ImageAdapter(Context context) 55 { 56 this.mContext=context; 57 } 58 //获取图片的个数 59 public int getCount() { 60 return mThumbIds.length; 61 } 62 63 //获取图片在库中的位置 64 public Object getItem(int position) { 65 return mThumbIds[position]; 66 } 67 68 //获取图片在库中的位置 69 public long getItemId(int position) { 70 return 0; 71 } 72 73 public View getView(int position, View convertView, ViewGroup parent) { 74 75 ImageView imageView; 76 if(convertView==null) 77 { 78 imageView=new ImageView(mContext); 79 imageView.setLayoutParams(new Gallery.LayoutParams(75, 75)); 80 imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); 81 imageView.setPadding(8, 8, 8, 8); 82 } 83 else{ 84 imageView = (ImageView) convertView; 85 } 86 87 imageView.setImageResource(mThumbIds[position]); 88 return imageView; 89 } 90 91 } 92 93 //展示图片 94 private Integer[] mThumbIds={ 95 R.drawable.heart, 96 R.drawable.heart_broken, 97 R.drawable.heart_delete, 98 R.drawable.heart_preferences, 99 R.drawable.heart_edit, 100 R.drawable.heart_new, 101 R.drawable.star_red, 102 R.drawable.meishi3, 103 R.drawable.meishi4, 104 R.drawable.meishi5, 105 }; 106 public boolean onCreateOptionsMenu(Menu menu) { 107 // Inflate the menu; this adds items to the action bar if it is present. 108 getMenuInflater().inflate(R.menu.main, menu); 109 return true; 110 } 111 112 }
这周就学到这点，期待下一次学习的进步...
