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 Demozoomcontrols.xml 代码 <?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代码 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 Demoinclude.xml代码 <?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代码 <?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代码 <?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代码 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 Demovideoview.xml代码 <?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 代码 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 Demowebview.xml代码 <?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代码 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/'>webabcd</a>", "text/html", "utf-8"); }}5、RatingBar 的 Demoratingbar.xml代码 <?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代码 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 Demotab.xml代码 <?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代码 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 Demospinner.xml代码 <?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代码 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 Demochronometer.xml代码 <?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代码 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代码 <?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代码 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"); }}?