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最新推荐文章于 2021-01-27 04:08:22 发布

qiaoyihebg

最新推荐文章于 2021-01-27 04:08:22 发布

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本文链接：https://blog.youkuaiyun.com/qiaoyihebg/article/details/80231095

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本文介绍了一个简单的Android应用程序，该应用使用多种UI组件如TextView、EditText、Button、ImageView和CheckBox，并展示了如何通过代码实现这些组件的基本交互功能，例如点击事件、文本显示及复选框状态改变等。

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private TextView tv_main_msg;
private EditText et_simp_num;
private Button bt_mainm_msg;
private ImageView iv_simple_play;
private CheckBox cb_simple_basketball;
private CheckBox cb_simple_football;
private CheckBox cb_simple_pingpang;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_simple_component);
tv_main_msg=(TextView) findViewById(R.id.tv_main_msg);
tv_main_msg.setText("今天天气好好哦");

et_simp_num=(EditText) findViewById(R.id.et_simp_num);
et_simp_num.setText("12345678123");

bt_mainm_msg=(Button) findViewById(R.id.bt_mainm_msg);
bt_mainm_msg.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
String number=bt_mainm_msg.getText().toString().trim();
Toast.makeText(SimpleComponentActivity.this, number,Toast.LENGTH_SHORT).show();

}
});
iv_simple_play=(ImageView) findViewById(R.id.iv_simple_play);
iv_simple_play.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
iv_simple_play.setBackgroundResource(android.R.drawable.alert_light_frame);
iv_simple_play.setBackgroundResource(android.R.drawable.ic_media_pause);

}
});
cb_simple_basketball=(CheckBox) findViewById(R.id.cb_simple_basketball);
cb_simple_football=(CheckBox) findViewById(R.id.cb_simple_basketball);
cb_simple_pingpang=(CheckBox) findViewById(R.id.cb_simple_pingpang);

//设置选中改变的监听
cb_simple_football.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
Toast.makeText(SimpleComponentActivity.this,"选中了足球", Toast.LENGTH_SHORT).show();
}

}
});

}
public void confirm(View v){
StringBuffer sb=new StringBuffer();
if(cb_simple_basketball.isChecked()){
sb.append(cb_simple_basketball.getText().toString()).append("");
}
if(cb_simple_football.isChecked()){
sb.append(cb_simple_football.getText().toString()).append("");
}
if(cb_simple_pingpang.isChecked()){
sb.append(cb_simple_pingpang.getText().toString()).append("");
}
//提示
Toast.makeText(this, sb.toString(), Toast.LENGTH_SHORT).show();

}
}