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 > |
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; } } } |
希望本文所述对大家Android程序设计有所帮助。