Gallery与自定义MyAdapter显示图片.doc

MainActivity.java package com.example.aaa; import android.os.Bundle; import android.app.Activity; import android.widget.Gallery; public class MainActivity extends Activity { Gallery gallery; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gallery=(Gallery) findViewById(R.id.gallery1); gallery.setAdapter(new MyAdapter(this)); gallery.setSelection(1); } } MyAdapter.java package com.example.aaa; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Gallery; import android.widget.ImageView; public class MyAdapter extends BaseAdapter { private Context mContext; private int[] imgs={ R.drawable.mm0, R.drawable.mm1, R.drawable.mm2, }; public MyAdapter(Context c) { super(); // TODO Auto-generated constructor stub mContext=c; } @Override public int getCount() { // TODO Auto-generated method stub return imgs.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ImageView iv=new ImageView(mContext); iv.setBackgroundResource(imgs[position]); iv.setAdjustViewBounds(true); iv.setLayoutParams(new Gallery.LayoutParams(300, 250)); return iv; } } main.xml LinearLayout xmlns:android=/apk/res/android xmlns:tools=/tools android:id=@+id/LinearLayout1 android:layout_width=match_parent android:layout_height=match_parent android:orientation=vertical android:paddingBottom=@dimen/activity_vertical_margin android:paddingLeft=@dimen/activity_horizontal_margin android:paddingRight=@dimen/activity_horizontal_margin