本文实例分析了Android中ImageView用法。分享给大家供大家参考,具体如下:
猜牌游戏大家可能以前都玩过,这里我们用这个小游戏来说明ImageView的用法。
首先,在res/drawable中引入三张牌:分别是梅花7,梅花8,梅花9
然后在res/layout/main.xml中配置一个TextView,三个ImageView以及一个Button
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<? xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:layout_width = "fill_parent"
android:layout_height = "fill_parent"
android:orientation = "vertical" >
< TextView
android:id = "@+id/tv"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
android:text = "@string/hello" />
< Button
android:id = "@+id/button"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
/>
< ImageView
android:id = "@+id/iv07"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
/>
< ImageView
android:id = "@+id/iv08"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
/>
< ImageView
android:id = "@+id/iv09"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content"
/>
</ LinearLayout >
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程序如下所示:
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import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class A04Activity extends Activity {
private ImageView iv07,iv08,iv09;
private TextView tv;
private Button b;
private int [] s={
R.drawable.puke07,
R.drawable.puke08,
R.drawable.puke09
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);
iv07=(ImageView)findViewById(R.id.iv07);
iv08=(ImageView)findViewById(R.id.iv08);
iv09=(ImageView)findViewById(R.id.iv09);
tv=(TextView)findViewById(R.id.tv);
b=(Button)findViewById(R.id.button);
randon();
//下面以ImageView的OnClickListener()方法对选择的不同牌做不同的反应
iv07.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
iv07.setImageDrawable(getResources().getDrawable(s[ 0 ]));
iv08.setImageDrawable(getResources().getDrawable(s[ 1 ]));
iv09.setImageDrawable(getResources().getDrawable(s[ 2 ]));
iv08.setAlpha( 100 ); //对没有选择的牌做灰暗处理
iv09.setAlpha( 100 );
if (s[ 0 ]==R.drawable.puke08){ //如果选择的牌是梅花8的话就猜对了
tv.setText( "恭喜你,猜对了!!!" );
}
else {
tv.setText( "亲,猜错了,要不要再来一次?" );
}
}
});
iv08.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
iv07.setImageDrawable(getResources().getDrawable(s[ 0 ]));
iv08.setImageDrawable(getResources().getDrawable(s[ 1 ]));
iv09.setImageDrawable(getResources().getDrawable(s[ 2 ]));
iv07.setAlpha( 100 );
iv09.setAlpha( 100 );
if (s[ 1 ]==R.drawable.puke08){
tv.setText( "恭喜你,猜对了!!!" );
}
else {
tv.setText( "亲,猜错了,要不要再来一次?" );
}
}
});
iv09.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
iv07.setImageDrawable(getResources().getDrawable(s[ 0 ]));
iv08.setImageDrawable(getResources().getDrawable(s[ 1 ]));
iv09.setImageDrawable(getResources().getDrawable(s[ 2 ]));
iv07.setAlpha( 100 );
iv08.setAlpha( 100 );
if (s[ 2 ]==R.drawable.puke09){
tv.setText( "恭喜你,猜对了!!!" );
}
else {
tv.setText( "亲,猜错了,要不要再来一次?" );
}
}
});
b.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
tv.setText( "猜猜梅花8在哪里" );
iv07.setImageDrawable(getResources().getDrawable(R.drawable.puke00));
//刚开始的时候显示扑克牌的背面
iv08.setImageDrawable(getResources().getDrawable(R.drawable.puke00));
iv09.setImageDrawable(getResources().getDrawable(R.drawable.puke00));
iv07.setAlpha( 255 ); //
iv08.setAlpha( 255 );
iv09.setAlpha( 255 );
randon();
}
});
}
//randon方法是进行随机地洗牌
public void randon(){
for ( int i= 0 ;i<s.length;i++){
int tmp=s[i];
int a=( int )(Math.random()* 2 );
s[i]=s[a];
s[a]=tmp;
}
}
}
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希望本文所述对大家Android程序设计有所帮助。