Android学习08-----Android中的基本控件（下）(3)_随笔提示文本：AutoCompleteTextView 拖动条：SeekBar和评分组件
一、随笔提示文本： AutoCompleteTextView
res/layout/main.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" >
<AutoCompleteTextView
android:id="@+id/myauto"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
AutoCompleteTextViewActivity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
public class AutoCompleteTextViewActivity extends Activity {
private static final String DATA[] = new String[] { "hello", "hello java",
"hello xdwang", "hello world", "mldn Android" };
private AutoCompleteTextView myauto = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, DATA); // 数据集
this.myauto = (AutoCompleteTextView) super.findViewById(R.id.myauto); // 取得组件
this.myauto.setAdapter(adapter); // 设置内容
}
}
二、拖动条： SeekBar
1 、事件处理
Main.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" >
<SeekBar
android:id="@+id/seekbar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
SeekBar01Activity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.widget.SeekBar;
import android.widget.TextView;
public class SeekBar01Activity extends Activity {
private SeekBar seekbar = null;
private TextView text = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.seekbar = (SeekBar) super.findViewById(R.id.seekbar); // 取得组件
this.text = (TextView) super.findViewById(R.id.text); // 取得组件
this.text.setMovementMethod(ScrollingMovementMethod.getInstance()); // 文本组件的内容可以滚动
this.seekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListenerImpl());
}
private class OnSeekBarChangeListenerImpl implements
SeekBar.OnSeekBarChangeListener {
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
SeekBar01Activity.this.text.append("*** 开始拖动，当前值："
+ seekBar.getProgress() + "\n");
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
SeekBar01Activity.this.text.append("*** 正在拖动，当前值："
+ seekBar.getProgress() + "\n");
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
SeekBar01Activity.this.text.append("*** 停止拖动，当前值："
+ seekBar.getProgress() + "\n");
}
}
}
1、 图片浏览
Main.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" >
<ImageView
android:id="@+id/pic"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/pic_0" />
<SeekBar
android:id="@+id/seekbar"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
SeekBar02Activity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.SeekBar;
public class SeekBar02Activity extends Activity {
private SeekBar seekbar = null;
private ImageView pic = null;
private int picData[] = new int[] { R.drawable.pic_0, R.drawable.pic_1,
R.drawable.pic_2, R.drawable.pic_3, R.drawable.pic_4,
R.drawable.pic_5, R.drawable.pic_6, R.drawable.pic_7,
R.drawable.pic_8, R.drawable.pic_9 };
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.seekbar = (SeekBar) super.findViewById(R.id.seekbar); // 取得组件
this.pic = (ImageView) super.findViewById(R.id.pic); // 取得组件
this.seekbar.setMax(9); // 0 ~ 9的范围
this.seekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListenerImpl());
}
private class OnSeekBarChangeListenerImpl implements
SeekBar.OnSeekBarChangeListener {
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
SeekBar02Activity.this.pic
.setImageResource(SeekBar02Activity.this.picData[seekBar
.getProgress()]);// 设置显示图片
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}
}
3 、改变屏幕亮度
SeekBar03Activity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.view.WindowManager;
import android.widget.SeekBar;
public class SeekBar03Activity extends Activity {
private SeekBar seekbar = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.seekbar = (SeekBar) super.findViewById(R.id.seekbar); // 取得组件
this.seekbar.setMax(100);
this.seekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListenerImpl());
}
private class OnSeekBarChangeListenerImpl implements
SeekBar.OnSeekBarChangeListener {
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
SeekBar03Activity.this.setScreenBrightness((float) seekBar
.getProgress() / 100);
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}
private void setScreenBrightness(float num) { // 0 ~ 1表示亮度
WindowManager.LayoutParams layoutParams = super.getWindow()
.getAttributes(); // 取得屏幕的属性
layoutParams.screenBrightness = num; // 设置屏幕亮度
super.getWindow().setAttributes(layoutParams); // 重新设置窗口的属性
}
}
三、评分组件： RatingBar
1 、基本实现
RatingBar01Activity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.TextView;
public class RatingBar01Activity extends Activity {
private RatingBar ratingBarA = null;
private TextView text = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.ratingBarA = (RatingBar) super.findViewById(R.id.ratingbarA);
this.text = (TextView) super.findViewById(R.id.text);
this.ratingBarA
.setOnRatingBarChangeListener(new OnRatingBarChangeListenerImpl());
}
private class OnRatingBarChangeListenerImpl implements
OnRatingBarChangeListener {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
RatingBar01Activity.this.text.append("*** 当前值（Rating）："
+ ratingBar.getRating() + "，步长：" + ratingBar.getStepSize()
+ "\n");
}
}
}
main.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" >
<RatingBar
android:id="@+id/ratingbarA"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:isIndicator="false"
android:numStars="5"
android:stepSize="0.5" />
<RatingBar
android:id="@+id/ratingbarB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:isIndicator="true"
android:numStars="5"
android:rating="3" />
<TextView
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
2、 自定义图片
drawable-hdpi/ star_conf_file.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+android:id/background"
android:drawable="@drawable/star_empty"/>
<item
android:id="@+android:id/secondaryProgress"
android:drawable="@drawable/star_empty"/>
<item
android:id="@+android:id/progress"
android:drawable="@drawable/star_full"/>
</layer-list>
Value/styles.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <style name="myRatingBar" parent="@android:style/Widget.RatingBar"> <item name="android:progressDrawable"> @drawable/star_conf_file </item> <item name="android:minHeight">53dip</item> <item name="android:maxHeight">53dip</item> </style> </resources>
RatingBar02Activity.java
package com.iflytek.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.TextView;
public class RatingBar02Activity extends Activity {
private RatingBar ratingBar = null;
private TextView text = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.ratingBar = (RatingBar) super.findViewById(R.id.ratingbar);
this.text = (TextView) super.findViewById(R.id.text);
this.ratingBar
.setOnRatingBarChangeListener(new OnRatingBarChangeListenerImpl());
}
private class OnRatingBarChangeListenerImpl implements
OnRatingBarChangeListener {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
int num = (int) rating;
String result = null; // 保存文字信息
switch (num) {
case 5:
result = "非常满意";
break;
case 4:
result = "满意";
break;
case 3:
result = "还可以";
break;
case 2:
result = "不满意";
break;
case 1:
result = "非常不满意";
break;
}
RatingBar02Activity.this.text.setText(result);
}
}
}