系出名门Android(7) - 控件(View)之ZoomControls, Include, VideoView, WebView, RatingBar, Tab, Spinner, Chronometer, ScrollView

介绍

 

在 Android 中使用各种控件(View)

ZoomControls - 放大/缩小按钮控件

Include - 整合控件

VideoView - 视频播放控件

WebView - 浏览器控件

RatingBar - 评分控件

Tab - 选项卡控件

Spinner - 下拉框控件

Chronometer - 计时器控件

ScrollView - 滚动条控件

 

 

1、ZoomControls 的 Demo

zoomcontrols.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- 放大/缩小按钮控件 --> <ZoomControls android:id="@+id/zoomControls" android:layout_width="wrap_content" android:layout_height="wrap_content"></ZoomControls></LinearLayout>

_ZoomControls.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Toast;import android.widget.ZoomControls;public class _ZoomControls extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.zoomcontrols); setTitle("ZoomControls"); ZoomControls zoomControls=(ZoomControls) this.findViewById(R.id.zoomControls); //setOnZoomInClickListener() - 响应单击放大按钮的事件 zoomControls.setOnZoomInClickListener(new OnClickListener() { public void onClick(View v) { Toast.makeText(_ZoomControls.this, "单击了放大按钮", Toast.LENGTH_SHORT).show(); } }); //setOnZoomOutClickListener() - 响应单击缩小按钮的事件 zoomControls.setOnZoomOutClickListener(new OnClickListener() { public void onClick(View v) { Toast.makeText(_ZoomControls.this, "单击了缩小按钮", Toast.LENGTH_SHORT).show(); } }); }}

 

2、Include的Demo

include.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- include - 整合控件，将指定的 layout 整合进来 layout - 指定需要整合 layout --> <include android:id="@+id/cell1" layout="@layout/include_1" /> <include android:id="@+id/cell2" android:layout_width="fill_parent" layout="@layout/include_2" /></LinearLayout>

include_1.xml

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android" android:text="TextView01" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>

include_2.xml

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android" android:text="TextView02" android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>

_Include.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;public class _Include extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.include); setTitle("Include"); }}

 

3、VideoView的Demo

videoview.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- VideoView - 视频播放控件 --> <VideoView android:id="@+id/videoView" android:layout_width="wrap_content" android:layout_height="wrap_content"> </VideoView></LinearLayout>

_VideoView.java

package com.webabcd.view;import android.app.Activity;import android.net.Uri;import android.os.Bundle;import android.widget.MediaController;import android.widget.VideoView;public class _VideoView extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.videoview); setTitle("VideoView"); VideoView videoView=(VideoView) findViewById(R.id.videoView); //指定需要播放的视频的地址 videoView.setVideoURI(Uri.parse("android.resource://com.webabcd.view/" + R.raw.demo)); //videoView.setVideoPath(); //设置播放器的控制条 videoView.setMediaController(new MediaController(this)); //开始播放视频 videoView.start(); }}

 

4、WebView的Demo

webview.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- WebView - 浏览器控件（WebKit 内核） --> <WebView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/webView" /></LinearLayout>

_WebView.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.webkit.WebSettings;import android.webkit.WebView;public class _WebView extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.webview); setTitle("WebView"); WebView webView=(WebView) findViewById(R.id.webView); //配置浏览器，使其可支持 JavaScript WebSettings webSettings=webView.getSettings(); webSettings.setJavaScriptEnabled(true); //清除浏览器缓存 webView.clearCache(true); //指定浏览器需要解析的 url 地址 webView.loadUrl("http://webabcd.cnblogs.com/"); //指定浏览器需要解析的 html 数据 //webView.loadData("<a href="http://webabcd.cnblogs.com/" mce_href="http://webabcd.cnblogs.com/">webabcd</a>", "text/html", "utf-8"); }}

 

5、RatingBar的Demo

ratingbar.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- RatingBar - 评分控件 numStars - 评分控件的星星的数量 rating - 当前评分的值 --> <RatingBar android:id="@+id/ratingBar" android:numStars="5" android:rating="1.5" android:layout_width="wrap_content" android:layout_height="wrap_content"> </RatingBar> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" /></LinearLayout>

_RatingBar.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.widget.RatingBar;import android.widget.TextView;public class _RatingBar extends Activity implements RatingBar.OnRatingBarChangeListener { private RatingBar mRatingBar; private TextView mTextView; @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.ratingbar); setTitle("RatingBar"); mTextView=(TextView) findViewById(R.id.textView); mRatingBar=(RatingBar) findViewById(R.id.ratingBar); //setOnRatingBarChangeListener() - 响应评分值发生改变的事件 mRatingBar.setOnRatingBarChangeListener(this); } @Override public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) { mTextView.setText(String.valueOf(rating)); }}

 

6、Tab的Demo

tab.xml

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- Tab 1 的内容　--> <TextView android:id="@+id/view1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="tab1 content" /> <!-- Tab 2 的内容 --> <TextView android:id="@+id/view2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="tab2 content" /></FrameLayout>

_Tab.java

package com.webabcd.view;import android.app.TabActivity;import android.content.Intent;import android.os.Bundle;import android.view.LayoutInflater;import android.widget.TabHost;//实现 Tab 功能的话要继承 TabActivitypublic class _Tab extends TabActivity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); TabHost tabHost=getTabHost(); LayoutInflater.from(this).inflate(R.layout.tab, tabHost.getTabContentView(), true); //Tab 1 的内容 tabHost.addTab(tabHost.newTabSpec("tab1") .setIndicator("tab1") .setContent(R.id.view1)); //Tab 2 的内容（设置了 Tab 图片） tabHost.addTab(tabHost.newTabSpec("tab2") .setIndicator("tab2", getResources().getDrawable(R.drawable.icon01)) .setContent(R.id.view2)); //Tab 3 的内容（设置 Tab 的内容为指定的 Activity） tabHost.addTab(tabHost.newTabSpec("tab3") .setIndicator("tab3") .setContent(new Intent(this, _TextView.class))); }}

 

7、Spinner的Demo

spinner.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/textView" /> <!-- Spinner - 下拉框控件 --> <Spinner android:id="@+id/spinner" android:layout_width="fill_parent" android:layout_height="wrap_content" /></LinearLayout>

_Spinner.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class _Spinner extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.spinner); setTitle("Spinner"); Spinner spinner=(Spinner) findViewById(R.id.spinner); //设置下拉框控件的标题文本 spinner.setPrompt("请选择"); //实例化适配器，指定显示格式及数据源 ArrayAdapter<CharSequence> adapter=ArrayAdapter.createFromResource( this, R.array.colors, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); //setOnItemSelectedListener() - 响应下拉框的选中值发生变化的事件 spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { TextView textView=(TextView)_Spinner.this.findViewById(R.id.textView); textView.setText(((TextView)arg1).getText()); } @Override public void onNothingSelected(AdapterView<?> arg0) { } }); }}

 

8、Chronometer的Demo

chronometer.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- Chronometer - 计时器控件 --> <Chronometer android:id="@+id/chronometer" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/btnStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="开始计时"> <requestFocus /> </Button> <Button android:id="@+id/btnStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止计时"> </Button> <Button android:id="@+id/btnReset" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="计时器复位"> </Button></LinearLayout>

_Chronometer.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.os.SystemClock;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Chronometer;public class _Chronometer extends Activity { private Chronometer mChronometer; @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.chronometer); setTitle("Chronometer"); Button button; mChronometer=(Chronometer) findViewById(R.id.chronometer); //设置计时器所显示的时间格式 mChronometer.setFormat("计时：(%s)"); button=(Button) findViewById(R.id.btnStart); button.setOnClickListener(mStartListener); button=(Button) findViewById(R.id.btnStop); button.setOnClickListener(mStopListener); button=(Button) findViewById(R.id.btnReset); button.setOnClickListener(mResetListener); } View.OnClickListener mStartListener=new OnClickListener() { public void onClick(View v) { //启动计时器 mChronometer.start(); } }; View.OnClickListener mStopListener=new OnClickListener() { public void onClick(View v) { //暂停计时器 mChronometer.stop(); } }; View.OnClickListener mResetListener=new OnClickListener() { public void onClick(View v) { //复位计时器，即停止计时器 mChronometer.setBase(SystemClock.elapsedRealtime()); } };}

 

9、ScrollView的Demo

scrollview.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <!-- ScrollView - 滚动条控件 scrollbarStyle - 滚动条的样式 --> <ScrollView android:id="@+id/scrollView" android:layout_width="fill_parent" android:layout_height="200px" android:scrollbarStyle="outsideOverlay" android:background="@android:drawable/edit_text"> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/textView" /> </ScrollView></LinearLayout>

_ScrollView.java

package com.webabcd.view;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class _ScrollView extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { //TODO Auto-generated method stub super.onCreate(savedInstanceState); this.setContentView(R.layout.scrollview); setTitle("ScrollView"); TextView textView=(TextView)this.findViewById(R.id.textView); textView.setText("a/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na/na"); }}