Android_baseComponentExample
xml布局文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="学号:" android:textSize="20sp" /> <AutoCompleteTextView android:id="@+id/actv_number" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="5" android:hint="请输入学号" android:inputType="number" android:completionThreshold="2"/> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="密 码:" android:textSize="20sp"/> <EditText android:id="@+id/et_psd" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入密码" android:textSize="20sp" android:inputType="textPassword"/> </LinearLayout> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" > <TextView android:id="@+id/hobby" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="爱好：" android:textSize="20sp" /> <CheckBox android:id="@+id/cb_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/hobby" android:layout_alignParentLeft="true" android:text="唱歌" android:checked="true" android:textSize="15sp"/> <CheckBox android:id="@+id/cb_2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/hobby" android:layout_toRightOf="@id/cb_1" android:layout_marginLeft="5dp" android:text="打球" android:checked="true" android:textSize="15sp"/> <CheckBox android:id="@+id/cb_3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/hobby" android:layout_toRightOf="@id/cb_2" android:layout_marginLeft="5dp" android:text="玩游戏" android:textSize="15sp"/> <CheckBox android:id="@+id/cb_4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/hobby" android:layout_toRightOf="@id/cb_3" android:text="敲代码" android:textSize="15sp" /> <CheckBox android:id="@+id/cb_all" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="全选" android:textSize="15sp" android:layout_below="@id/cb_1" android:layout_centerHorizontal="true"/> </RelativeLayout> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="性别：" android:textSize="20sp" /> <Spinner android:id="@+id/sex" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/commit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom" android:text="提交" android:textSize="15sp" /> <Button android:id="@+id/reset" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom" android:text="重置" android:textSize="15sp" /> </LinearLayout> </LinearLayout>
源代码：
package com.example.day04_work; import java.util.ArrayList; import java.util.List; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.Spinner; import android.widget.Toast; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; public class MainActivity extends Activity implements OnClickListener,OnCheckedChangeListener{ private EditText et_psd; private CheckBox cb_1; private CheckBox cb_2; private CheckBox cb_3; private CheckBox cb_4; private CheckBox cb_all; private Student student = new Student(); private Button reset; private Button commit; private List<CheckBox> check1; private String srcnumber; private String srcpsd; private AutoCompleteTextView actv_number; private CheckBox[] checks; private Spinner spinner_sex; private String sex; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); actv_number= (AutoCompleteTextView) findViewById(R.id.actv_number); //得到数据源 String[] stringArray = getResources().getStringArray(R.array.number); //定义适配器 ArrayAdapter<String>adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_dropdown_item_1line,stringArray); //设置适配器 actv_number.setAdapter(adapter); //得到控件 et_psd = (EditText)findViewById(R.id.et_psd); cb_1 = (CheckBox) findViewById(R.id.cb_1); cb_2 = (CheckBox) findViewById(R.id.cb_2); cb_3= (CheckBox) findViewById(R.id.cb_3); cb_4 = (CheckBox) findViewById(R.id.cb_4); cb_all =(CheckBox)findViewById(R.id.cb_all); reset = (Button)findViewById(R.id.reset); commit = (Button)findViewById(R.id.commit); spinner_sex= (Spinner) findViewById(R.id.sex); ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_dropdown_item_1line,new String[]{"男","女"}); spinner_sex.setAdapter(adapter2); //得到初始化时的所有数据 getInitialContent(); //为所有控件设置监听事件 actv_number.setOnClickListener(this); et_psd.setOnClickListener(this); cb_1.setOnCheckedChangeListener(this); cb_2.setOnCheckedChangeListener(this); cb_3.setOnCheckedChangeListener(this); cb_4.setOnCheckedChangeListener(this); cb_all.setOnCheckedChangeListener(this); //提交按钮监听事件 commit.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { String number = actv_number.getText().toString(); String psd = et_psd.getText().toString(); if(number.length()!=0 && psd.length()!=0){ student.setNumber(Integer.parseInt(number)); student.setPsd(psd); }else{ Toast.makeText(MainActivity.this, "学号密码不能为空！", 0).show(); return; } String result = ""; // TODO Auto-generated method stub for (CheckBox checkBox : checks) { if(checkBox.isChecked()){ result +=checkBox.getText().toString(); } } //安卓自带工具 TextUtils textUtils判断字符串是否为空 //TextUtils.isEmpty(string) if(result.length()!=0){ student.setHobby(result); }else{ Toast.makeText(MainActivity.this, "爱好不能为空", 0).show(); } student.setSex(sex); Toast.makeText(MainActivity.this, student.toString(), 1).show(); } }); //重置按钮监听事件 reset.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub et_psd.setText(srcpsd); //学号获得焦点，光标在学号输入框上 actv_number.requestFocus(); actv_number.setText(srcnumber); //将初始化复选框数组中的控件设置为选中 for (CheckBox checkBox2 : check1) { checkBox2.setChecked(true); } //遍历所有复选框，如果初始化复选框控件中不包含该复选框，设置为不选中 for (CheckBox checkBox : checks) { if(!check1.contains(checkBox)){ checkBox.setChecked(false); } } spinner_sex.setSelection(0, true); } }); //下拉列表选择性别 spinner_sex.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { sex = spinner_sex.getItemAtPosition(position).toString(); } @Override public void onNothingSelected(AdapterView<?> parent) { // TODO Auto-generated method stub } }) ; } /** * 得到初始化数据 */ private void getInitialContent() { // TODO Auto-generated method stub srcnumber = actv_number.getText().toString(); srcpsd = et_psd.getText().toString(); checks = new CheckBox[] {cb_1,cb_2,cb_3,cb_4,cb_all}; check1 = new ArrayList<CheckBox>(); for (CheckBox checkBox : checks) { if(checkBox.isChecked()){ check1.add(checkBox); } } spinner_sex.setSelection(0, true); } /** 复选框监听事件： * 全选功能: * 1.全选状态改变： * 1.1 全选框选中时，所有复选框都选中 * 1.2全选框取消时，如果所有复选框都为选中状态，则将所有复选框设置为不选中 * 2.其他复选框选中时： * 2.1当所有复选框选中时，将全选框设置为选中 * 2.2否则，将全选框设置为不选中 */ @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { List<String> list = new ArrayList<String>(); // TODO Auto-generated method stub if(buttonView.getId() == cb_all.getId()){ if(cb_all.isChecked()){ cb_1.setChecked(true); cb_2.setChecked(true); cb_3.setChecked(true); cb_4.setChecked(true); }else if(cb_1.isChecked() && cb_2.isChecked() && cb_3.isChecked() && cb_4.isChecked()){ cb_1.setChecked(false); cb_2.setChecked(false); cb_3.setChecked(false); cb_4.setChecked(false); } }else{ if(cb_1.isChecked() && cb_2.isChecked() && cb_3.isChecked() && cb_4.isChecked()){ cb_all.setChecked(true); }else{ cb_all.setChecked(false); } } } @Override public void onClick(View v) { // TODO Auto-generated method stub String number = actv_number.getText().toString(); String psd = et_psd.getText().toString(); if(number!=null && psd != null){ Toast.makeText(MainActivity.this, "学号："+number+",密码"+psd, 0).show(); } } }
