Android UI控件详解-CheckBox(多选框)
16lz
2021-01-23
package com.example.duoxuan;import android.os.Bundle;import android.app.Activity;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.Toast;/** * * @author TXF * * 多选框 * 还有一种相对简单的方法来实现，这里就不再写了。 * */public class MainActivity extends Activity {private CheckBox mcb1, mcb2, mcb3, mcb4;private Button mbtn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mcb1 = (CheckBox) findViewById(R.id.cb_0);mcb2 = (CheckBox) findViewById(R.id.cb_1);mcb3 = (CheckBox) findViewById(R.id.cb_2);mcb4 = (CheckBox) findViewById(R.id.cb_3);mbtn = (Button) findViewById(R.id.submit);// 设置被选择监听器，这个监听器和RadioGroup的监听器是一样的mcb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {if (mcb1.isChecked()) {displayToast("你选择了" + mcb1.getText());}}});mcb2.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {if (mcb2.isChecked()) {displayToast("你选择了" + mcb2.getText());}}});mcb3.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {if (mcb3.isChecked()) {displayToast("你选择了" + mcb3.getText());}}});mcb4.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {if (mcb4.isChecked()) {displayToast("你选择了" + mcb4.getText());}}});mbtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {int num = 0;if (mcb1.isChecked()) {num++;}if (mcb2.isChecked()) {num++;}if (mcb3.isChecked()) {num++;}if (mcb4.isChecked()) {num++;}displayToast("谢谢诶参与，您一共选择了" + num + "项");}});}private void displayToast(String str) {Toast toast = Toast.makeText(this, str, 0);toast.setGravity(Gravity.CENTER, 0, 0);toast.show();}}xml布局
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