imageview的点击事件

最新推荐文章于 2021-05-27 15:10:13 发布

转载最新推荐文章于 2021-05-27 15:10:13 发布 · 1.3w 阅读

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本文介绍了一个简单的 Android 应用案例，该应用通过点击不同的 ImageView 控件来切换图片，并根据点击结果给出相应的文本反馈。文章展示了如何使用 OnClickListener 来实现点击事件，以及如何通过 setAlpha 方法调整 ImageView 的透明度。

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import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class MyActivity extends Activity {
ImageView mImageView01;
ImageView mImageView02;
ImageView mImageView03;
private static int[] s1 = new int[] { R.drawable.p01, R.drawable.p02,
R.drawable.p03 };

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mImageView01 = (ImageView) findViewById(R.id.iv01);
mImageView02 = (ImageView) findViewById(R.id.iv02);
mImageView03 = (ImageView) findViewById(R.id.iv03);
randon();
mImageView01.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
mImageView01.setImageDrawable(getResources().getDrawable(s1[0]));
mImageView02.setImageDrawable(getResources().getDrawable(s1[1]));
mImageView03.setImageDrawable(getResources().getDrawable(s1[2]));
mImageView02.setAlpha(100);
mImageView03.setAlpha(100);
if(s1[0]==R.drawable.p01){
mTextView.setText("恭喜您猜对了!!");
}else{
mTextView.setText("再接再厉!!");
}
}
});
mImageView02.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
mImageView01.setImageDrawable(getResources().getDrawable(s1[0]));
mImageView02.setImageDrawable(getResources().getDrawable(s1[1]));
mImageView03.setImageDrawable(getResources().getDrawable(s1[2]));
mImageView01.setAlpha(100);
mImageView03.setAlpha(100);
if(s1[1]==R.drawable.p01){
mTextView.setText("恭喜您猜对了!!");
}else{
mTextView.setText("再接再厉!!");
}
}
});
mImageView03.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
mImageView01.setImageDrawable(getResources().getDrawable(s1[0]));
mImageView02.setImageDrawable(getResources().getDrawable(s1[1]));
mImageView03.setImageDrawable(getResources().getDrawable(s1[2]));
mImageView02.setAlpha(100);
mImageView01.setAlpha(100);
if(s1[2]==R.drawable.p01){
mTextView.setText("恭喜您猜对了!!");
}else{
mTextView.setText("再接再厉!!");
}
}
});