制作简单的图片浏览器

（1）加载图片和浏览图片的布局文件

图片预先放置在这里。



主要的布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
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=".MainActivity" >
<LinearLayout
android:id="@+id/L1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="@+id/b1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/p1" />
<Button
android:id="@+id/b2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/p2" />

</LinearLayout>
<ImageButton
android:id="@+id/I1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageButton>
</LinearLayout>
（2）主要控制代码，点击下一张，上一张浏览图片

package com.example.tupian;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
ImageView iv;
int count;
int draeableIds[]={
R.drawable.pic0,
R.drawable.pic1,
R.drawable.pic2,
R.drawable.pic3,
R.drawable.pic4,
R.drawable.pic5,
R.drawable.pic6,
R.drawable.pic7,
R.drawable.pic8,
R.drawable.pic9 ,
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv=(ImageView)findViewById(R.id.I1);
iv.setImageResource(R.drawable.no0);
Button b2=(Button)findViewById(R.id.b2);
Button b1=(Button)findViewById(R.id.b1);
b1.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

if(count>0)
{
iv.setImageResource(draeableIds[--count]);
}
else

Toast.makeText(MainActivity.this, "这是第一幅", Toast.LENGTH_SHORT).show();
}
});
b2.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

if(count<draeableIds.length-1)
{
iv.setImageResource(draeableIds[++count]);
}
else
Toast.makeText(MainActivity.this, "这是最后一幅", Toast.LENGTH_SHORT).show();
}
});

}

@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;
}

}


按照上面的步骤做一个简单的图片浏览器就做好了。