Android UI系列：TextView显示文本

一、实例

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/textView_content" />
</LinearLayout>

package com.example.test;

import android.app.Activity;
import android.os.Bundle;

public class TextViewActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text_view);
}
}

<activity
android:name="TextViewActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

二、TextView类结构

三、TextView属性

<input-extras>

EditorInfo.actionId

EditorInfo.actionLabel

四、能过代码方式建立TextView

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView= new TextView(this);
textView.setText(getText(R.string.textView_content));

setContentView(textView);
}

五、走马灯效果

android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true"
android:marqueeRepeatLimit="marquee_forever"
android:singleLine="true"

<string name="textView_content">我是Textview，大家要好好学习！我是Textview，大家要好好学习！</string>

public class TextViewActivity extends Activity {
private TextView textView = null;
private boolean changeColor = false;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text_view);
textView = (TextView) findViewById(R.id.text_view);

new Thread(new MyThread()).start();

}

//实现半秒就改变一次颜色
class MyThread implements Runnable {
@Override
public void run() {
//传说中死循环，半秒就改变一次
while (true) {
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}

Message message = new Message();
if (changeColor = !changeColor) {
message.what = COLOR_BLACK;
} else {
message.what = COLOR_RED;
}
handler.sendMessage(message);
}
}// end run

}

private final int COLOR_RED = 1;//红色
private final int COLOR_BLACK = 2;//黑色
private MyHandler handler = new MyHandler();

class MyHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case COLOR_RED:
textView.setTextColor(Color.RED);
break;
case COLOR_BLACK:
textView.setTextColor(Color.BLACK);
break;

default:
break;
}
}
}
}

六、在文本中创建上下文链接

none

web

email

phone

map

all

七、获取本地资源及格式化

text_view_1.setText(getText(R.string.text_format));
text_view_2.setText(getString(R.string.text_format));
text_view_3.setText(getResources().getString(R.string.text_format));

String htmlStr="我是<font color=red>中国人</font>。<br/>我你他也是<font color=green>中国人</font>呀。";
text_view_4.setText(Html.fromHtml(htmlStr));

<string name="other _format"><![CDATA[在这里输入特殊的字符，不会报错的]]></string>

<string name="textview_param">我是%1$s,我的年龄是%2$d</string>

text_view_5.setText(getString(R.string.textview_param, "科学家",20));

九、属性介绍