android的GridView和Gallery _android

枕上从妨一夜睡，灯前读尽十年诗。这篇文章主要讲述android的GridView和Gallery相关的知识，希望能为你提供帮助。
【android的GridView和Gallery】GridView:
activity_main.xml

< RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.gridview.MainActivity" > < GridView android:id="@+id/gridView1_1" android:layout_width="match_parent" android:layout_height="wrap_content" android:numColumns="auto_fit" android:columnWidth="90dp" android:verticalSpacing="2dp" android:horizontalSpacing="2dp" android:stretchMode="columnWidth" android:gravity="center" > < /GridView> < /RelativeLayout>

MainActivity

package com.example.gridview; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; public class MainActivity extends Activity { private GridView gridView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gridView=(GridView) findViewById(R.id.gridView1_1); MyImageAdapter myImageAdapter=new MyImageAdapter(this); gridView.setAdapter(myImageAdapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } static class MyImageAdapter extends BaseAdapter{ private Context ct; //要显示的图片资源 private int [] images={ R.drawable.th_seismometer_1, R.drawable.th_skippylite, R.drawable.th_sms_hey_blue, R.drawable.th_ssh, R.drawable.th_things1, R.drawable.th_thisday, R.drawable.th_seismometer_1, R.drawable.th_skippylite, R.drawable.th_sms_hey_blue, R.drawable.th_ssh, R.drawable.th_things1, R.drawable.th_thisday}; MyImageAdapter(Context ct){ this.ct=ct; } @Override public int getCount() { // TODO Auto-generated method stub return images.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 imageView; if(convertView==null){ imageView=new ImageView(ct); //设置图片的宽和高 imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); //设置拉伸或截取方式 imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(8, 8, 8, 8); }else{ imageView=(ImageView)convertView; } imageView.setImageResource(images[position]); return imageView; } } }

Gallery:
activity_main.xml

< RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.gallery.MainActivity" > < Gallery android:id="@+id/gallery1_1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="60dp" android:layout_marginTop="60dp" > < /Gallery> < /RelativeLayout>

MainActivity

package com.example.gallery; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Gallery; import android.widget.ImageView; public class MainActivity extends Activity { private Gallery gallery; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gallery=(Gallery) findViewById(R.id.gallery1_1); MyGalleryAdapter myGalleryAdapter=new MyGalleryAdapter(); gallery.setAdapter(myGalleryAdapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } class MyGalleryAdapter extends BaseAdapter{ private int [] images={ R.drawable.th_seismometer_1, R.drawable.th_skippylite, R.drawable.th_sms_hey_blue, R.drawable.th_ssh, R.drawable.th_things1, R.drawable.th_thisday, R.drawable.th_seismometer_1, R.drawable.th_skippylite, R.drawable.th_sms_hey_blue, R.drawable.th_ssh, R.drawable.th_things1, R.drawable.th_thisday}; @Override public int getCount() { // TODO Auto-generated method stub return images.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 imageView; if(convertView==null){ imageView=new ImageView(MainActivity.this); }else{ imageView=(ImageView)convertView; } imageView.setImageResource(images[position]); return imageView; } } }