APIDEMO Text 学习

最新推荐文章于 2018-08-04 18:11:55 发布

最新推荐文章于 2018-08-04 18:11:55 发布 · 109 阅读

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1：自定义TextView

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.example.android.apis.text; import android.widget.TextView; import android.content.Context; import android.text.method.ScrollingMovementMethod; import android.text.method.MovementMethod; import android.text.method.KeyListener; import android.text.method.TransformationMethod; import android.text.Editable; import android.util.AttributeSet; import java.util.Map; /** * This is a TextView that is Editable and by default scrollable, * like EditText without a cursor. * * * XML attributes * * See * {@link android.R.styleable#TextView TextView Attributes}, * {@link android.R.styleable#View View Attributes} */ public class LogTextBox extends TextView { public LogTextBox(Context context) { this(context, null); } public LogTextBox(Context context, AttributeSet attrs) { this(context, attrs, android.R.attr.textViewStyle); } public LogTextBox(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected MovementMethod getDefaultMovementMethod() { return ScrollingMovementMethod.getInstance(); //具有ScrollView功能 } @Override public Editable getText() { //Return the text the TextView is displaying. If setText() was called with an argument //of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast the return value from this //method to Spannable or Editable, respectively. Note: The content of the return value //should not be modified. If you want a modifiable one, you should make your own copy first. return (Editable) super.getText(); } @Override public void setText(CharSequence text, BufferType type) { super.setText(text, BufferType.EDITABLE); //设置Text } }

2: Text 超链接处理

2.1：直接设置Text，系统处理

2.2：通过HTMl.fromHtml 解析String

2.3：通过Resource string

2.4：通过Scan 手动添加超链接

public class Link extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.link); // text1 shows the android:autoLink property, which // automatically linkifies things like URLs and phone numbers // found in the text. No java code is needed to make this // work. //text1 xml android:autoLink 自动定义了，无需java code // text2 has links specified by putting <a> tags in the string // resource. By default these links will appear but not // respond to user input. To make them active, you need to // call setMovementMethod() on the TextView object. //如果不加setMovementMethod，则会出现连接，但是不会响应点击 TextView t2 = (TextView) findViewById(R.id.text2); t2.setMovementMethod(LinkMovementMethod.getInstance()); // text3 shows creating text with links from HTML in the Java // code, rather than from a string resource. Note that for a // fixed string, using a (localizable) resource as shown above // is usually a better way to go; this example is intended to // illustrate how you might display text that came from a // dynamic source (eg, the network). TextView t3 = (TextView) findViewById(R.id.text3); t3.setText( Html.fromHtml( "text3: Text with a " + "<a href="\" mce_href="\""http://www.google.com\">link</a> " + "created in the Java source code using HTML.")); t3.setMovementMethod(LinkMovementMethod.getInstance()); //如果不加setMovementMethod，则会出现连接，但是不会响应点击 // text4 illustrates constructing a styled string containing a // link without using HTML at all. Again, for a fixed string // you should probably be using a string resource, not a // hardcoded value. //构造超链接完全不是用html,但是对固定的String我们应该使用String resource而不是 //硬代码 SpannableString ss = new SpannableString( "text4: Click here to dial the phone."); ss.setSpan(new StyleSpan(Typeface.BOLD), 0, 6, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); ss.setSpan(new URLSpan("tel:4155551212"), 13, 17, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); TextView t4 = (TextView) findViewById(R.id.text4); t4.setText(ss); t4.setMovementMethod(LinkMovementMethod.getInstance()); //如果不加setMovementMethod，则会出现连接，但是不会响应点击 } }

<string name="link_text_auto">text1: This is some text. In this text are some things that are actionable. For instance, you can click on http://www.google.com and it will launch the web browser. You can click on google.com too. And, if you click on (415) 555-1212 it should dial the phone. </string> <string name="link_text_manual">text2: This is some other text, with a <a href="http://www.google.com" mce_href="http://www.google.com">link</a> specified via an <a> tag. Use a \"tel:\" URL to <a href="tel:4155551212" mce_href="tel:4155551212">dial a phone number</a>. </string>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">   <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:autoLink="all" android:text="@string/link_text_auto" />  <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="@string/link_text_manual" />  <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text3" android:layout_width="fill_parent" android:layout_height="fill_parent" />  <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text4" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>