组件(Widget)的复合使用
16lz
2021-01-26
android中的组件可谓应有尽有,从简单的按钮(Button)到复杂的浏览器(WebView)都是无所不能,无所不有。
下面用一个用户注册会员为例来演示组件的使用,实现页面之间的切换:
TestWidgetActivity:
package com.lovo;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.View;import android.view.View.OnClickListener;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.CheckBox;import android.widget.EditText;import android.widget.RadioButton;import android.widget.Spinner;import android.widget.ToggleButton;public class TestWidgetActivity extends Activity {// 声明按钮Buttonprivate Button register, cancel;// 声明ToggleButtonprivate ToggleButton marriged;// 声明单选按钮private RadioButton male, female;// 声明文本编辑框EditTextprivate EditText username, password;// 声明下拉列表private Spinner position;// 声明多选按钮private CheckBox reading, swimming;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_test_widget_layout);// 获得EditText对象username = (EditText) findViewById(R.id.username);password = (EditText) findViewById(R.id.password);// 获得RadioButton对象male = (RadioButton) findViewById(R.id.male);female = (RadioButton) findViewById(R.id.female);// 获得CheckBox实例reading = (CheckBox) findViewById(R.id.reading);swimming = (CheckBox) findViewById(R.id.swimming);// 获得ToggleButton实例marriged = (ToggleButton) findViewById(R.id.marriged);// 获得Spinner实例position = (Spinner) findViewById(R.id.position);// 下拉列表项数组String[] str = { "CEO", "CFO", "PM" };// 数组下拉列表适配器ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item, str);// 设置数组下拉列表适配器position.setAdapter(adapter);// 获得Button实例register = (Button) findViewById(R.id.register);cancel = (Button) findViewById(R.id.cancel);register.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// 实例化Bundle对象,保存属性Bundle b = new Bundle();// 在Bundle中添加用户名和密码b.putString("username", "用户名:" + username.getText() + "");b.putString("password", "用户名:" + password.getText() + "");// 在Bundle中添加性别if (male.isChecked()) {b.putString("gender", "性别:男");} else {b.putString("gender", "性别:女");}String temp = "爱好:";if (reading.isChecked()) {temp += "阅读";}if (swimming.isChecked()) {temp += " ";temp += "游泳";}// 在Bundle中添加爱好b.putString("hobby", temp);// 在Bundle中添加婚否if (marriged.isChecked()) {b.putString("marriged", "婚否:已婚");} else {b.putString("marriged", "婚否:未婚");}// 在Bundle中添加职位b.putString("position", "职位:" + position.getSelectedItem() + "");// 实例化Intent,跳转到ResultActivityIntent intent = new Intent(TestWidgetActivity.this,ResultActivity.class);// 将Bundle 添加到Intentintent.putExtra("data", b);// 启动ActivitystartActivity(intent);}});}}
ResultActivity:
package com.lovo;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.ListView;public class ResultActivity extends Activity {// 声明ListViewprivate ListView listView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.result);// 获得ListView实例listView = (ListView) findViewById(R.id.ListView01);// 获得IntentIntent intent = this.getIntent();// 从Intent中获得BundleBundle b = intent.getBundleExtra("data");// 实例化List集合List list = new ArrayList();// 从Bundle中获得属性,添加到Listlist.add(b.getString("username"));list.add(b.getString("password"));list.add(b.getString("position"));list.add(b.getString("gender"));list.add(b.getString("hobby"));list.add(b.getString("marriged"));// 实例化数组适配器ArrayAdapter arrayAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_checked, list);// 为ListView设置适配器listView.setAdapter(arrayAdapter);}}
activity_test_widget_layout.xml:
<?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" > <TableLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:collapseColumns="3" android:stretchColumns="1" > <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/TextView01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="用户名" /> <EditText android:id="@+id/username" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="" /> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/TextView02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="密码" /> <EditText android:id="@+id/password" android:layout_width="wrap_content" android:layout_height="wrap_content" android:password="true" android:text="" /> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/TextView03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="性别" /> <RadioGroup android:id="@+id/gender_g" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal" > <RadioButton android:id="@+id/male" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="男" /> <RadioButton android:id="@+id/female" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="女" /> </RadioGroup> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/TextView04" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="婚否" /> <ToggleButton android:id="@+id/marriged" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textOff="未婚" android:textOn="已婚" /> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/hobby" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="爱好" /> <CheckBox android:id="@+id/reading" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="阅读" /> <CheckBox android:id="@+id/swimming" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="20dp" android:text="游泳" /> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/TextView05" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="职务" /> <Spinner android:id="@+id/position" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </TableRow> <TableRow android:layout_width="wrap_content" android:layout_height="wrap_content" > <Button android:id="@+id/cancel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="取消" /> <Button android:id="@+id/register" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="注册" /> </TableRow> </TableLayout></LinearLayout>
result.xml:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView android:id="@+id/ListView01" android:layout_width="wrap_content" android:layout_height="wrap_content" /></LinearLayout>
附上图片效果:
更多相关文章
- [Android]编译错误:Could not get unknown property 'release' f
- Activity的四种启动模式下的生命周期(全)2019.6.11
- Android轻量级开源缓存框架——ASimpleCache(ACache)源码分析
- Android(安卓)SDK——Android(安卓)Studio发布jar或aar到jcenter
- ButterKnife 8.4添加使用
- IIS 添加mime 支持 apk,exe,.woff,IIS MIME设置 ,Android(安卓)apk
- 我的Android进阶之旅------>解决错误:You need to use a Theme.Ap
- Android严格模式(StrictMode)
- android studio 中 java.lang.NoClassDefFoundError:retrofit2.R