张思民安卓 第三次作业

1、1.Xml: Java:package com.example.andy.androidclass3;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends AppCompatActivity implements View.OnClickListener privat

2、e Button button1,button2; private ImageView imageView; private int imgs =R.mipmap.img1, R.mipmap.img2,R.mipmap.img3,R.mipmap.img4,R.mipmap.img5,R.mipmap.img6; int index = 0; final int upper_limit=6; final int lower_limit=-1; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(

3、savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.front); button2 = (Button) findViewById(R.id.tail); imageView = (ImageView) findViewById(R.id.image); button1.setOnClickListener(this); button2.setOnClickListener(this); Override public void onClick(Vie

4、w v) if(v=button1) if(index = 0) index = upper_limit; index-; imageView.setImageResource(imgsindex); else if (v=button2) if(index = 5) index =lower_limit; index+; imageView.setImageResource(imgsindex); 2.Xml: Javapackage com.example.andy.androidclass3;import android.app.Activity;import android.os.Bu

5、ndle;import android.view.View;import android.view.ViewGroup;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.ViewSwi

6、tcher;public class MainActivity extends Activity private ImageSwitcher imageSwitcher; private Gallery gallery; private int imgs =R.mipmap.img1, R.mipmap.img2,R.mipmap.img3,R.mipmap.img4,R.mipmap.img5,R.mipmap.img6; Override protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInsta

7、nceState); setContentView(R.layout.activity_main); imageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher); imageSwitcher.setFactory(new viewFactory(); imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in); imageSwitcher.setOutAnimation(AnimationUtils.loadA

8、nimation(this, android.R.anim.fade_out); imageSwitcher.setImageResource(R.mipmap.img1); gallery = (Gallery) findViewById(R.id.gallery); gallery.setOnItemSelectedListener(new onItemSelectedListener(); gallery.setSpacing(10); gallery.setAdapter(new baseAdapter(); class onItemSelectedListener implement

9、s AdapterView.OnItemSelectedListener Override public void onItemSelected(AdapterView parent, View view, int position, long id) imageSwitcher.setImageResource(Integer) gallery.getItemAtPosition(position); Override public void onNothingSelected(AdapterView parent) class viewFactory implements ViewSwit

10、cher.ViewFactory Override public View makeView() ImageView imageView = new ImageView(MainActivity.this); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); return imageView; class baseAdapter extends BaseAdapter Override public int getCount() return imgs.length; Override public Object getItem(int position) return null; Override public long getItemId(int position) return imgsposition; Override public View getView(int position, View convertView, ViewGroup parent) ImageView imageView = new ImageView(MainActivity.this); image