在TextView中，有时会有需要根据内容格式来匹配动作，怎么理解呢
比如说我们看到一个网址如：www.baidu.com，我们希望能够连接过去，这时我们可以实现去自动识别网址，然后能够连接过去
废话少说，看代码：
activity_main.xml代码：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<Button
android:id="@+id/btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="myClick"
android:text="根据内容自动匹配动作的文本" />
</LinearLayout>
MainActivity.java代码：
package com.example.exercise3;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void myClick(View view){
Intent intent=new Intent();
switch(view.getId()){
case R.id.btn1:
intent.setClass(this, HtmlFormatText.class);
break;
case R.id.btn2:
intent.setClass(this, AutoMatch.class);
break;
case R.id.btn3:
intent.setClass(this, MyDefineActionTextView.class);
break;
case R.id.btn4:
intent.setClass(this, FormatTextView.class);
break;
case R.id.btn5:
intent.setClass(this,InputImageEditViewActivity.class);
break;
}
this.startActivity(intent);
}
}
点击btn2,启动AutoMatch.java
AutoMatch.java代码：
package com.example.exercise3;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class AutoMatch extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.auto_match);
TextView tv=(TextView)findViewById(R.id.match_txt);
String msg="百度：www.baidu.com\n";
msg+="8690423";
tv.setText(msg);
}
}
auto_match.xml代码：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/match_txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="all"
/>
</LinearLayout>
看了这么多，其实实现功能的代码就是：android:autoLink="all",
以后再开发过程中这样的使用方式并不多
如果各位朋友有什么疑问和建议，欢迎大家给我留言。。。
最近发现Android4.0系统中ProgressDialog设置为setCancelable(true)时，点击ProgressDialog以外的区域也可以让ProgressDialog dismiss掉。但有时我们不希望是这样的效果，于是将ProgressDialog设置setCancelable(false)，再点击ProgressDialog以外的区域就不会出现前面所说的情况了，然而这样以来再按返回键时就不起作用了，只能等待程序执行到dissmiss处为止。其实，只要为ProgressDialog添加KeyListener来对返回键予以处理就可以解决这个问题了。
今天看了一些QSettings的简单用法，可以用来保存程序的设置，使得程序每次启动都可以显示上次关闭时的状态。我这里实现了一个简单的文本编辑窗口，可以设置文本的字体，字体的颜色和背景色。每次关闭程序都保存程序的几何大小，位置和文本以及文本所设置的格式，方便启动程序后继续编辑。
文本编辑窗口class TextEditor:public QTextEdit
{
Q_OBJECT
public:
TextEditor(QWidget *parent = NULL);
~TextEditor();
void SaveSettings();
protected:
void ReadSettings();
void contextMenuEvent ( QContextMenuEvent * event );
private slots:
void SettingBackColorSlot();
void SettingTextColorSlot();
void SettingTextFontSlot();
};
TextEditor::TextEditor( QWidget *parent /*= NULL*/ ):QTextEdit(parent)
{
ReadSettings();
}
TextEditor::~TextEditor()
{
}
void TextEditor::contextMenuEvent( QContextMenuEvent * event )
{
QMenu *pMenu = createStandardContextMenu();
pMenu->addSeparator();
QTextCursor cursor = this->textCursor();
QString seletedText = cursor.selectedText();
if (!seletedText.isEmpty()) //选中文本才可以设置文本样式
{
QMenu *pSubMenu = new QMenu(tr("设置"),pMenu);
pMenu->addMenu(pSubMenu);
QAction *pFontAct = new QAction(tr("字体"),pSubMenu);
QAction *pTextColorAct = new QAction(tr("字体颜色"),pSubMenu);
QAction *pBackColorAct = new QAction(tr("背景色"),pSubMenu);
pSubMenu->addAction(pFontAct);
pSubMenu->addAction(pTextColorAct);
pSubMenu->addAction(pBackColorAct);
connect(pFontAct,SIGNAL(triggered ()),this,SLOT(SettingTextFontSlot()));
connect(pTextColorAct,SIGNAL(triggered ()),this,SLOT(SettingTextColorSlot()));
connect(pBackColorAct,SIGNAL(triggered ()),this,SLOT(SettingBackColorSlot()));
}
pMenu->exec(event->globalPos());
delete pMenu;
}
//设置文本背景色
void TextEditor::SettingBackColorSlot()
{
QColor color = QColorDialog::getColor(Qt::white, this, "Select Color", QColorDialog::DontUseNativeDialog);
if(color.isValid())
{
this->setTextBackgroundColor(color);
}
}
//设置文本颜色
void TextEditor::SettingTextColorSlot()
{
QColor color = QColorDialog::getColor(Qt::black, this, "Select Color", QColorDialog::DontUseNativeDialog);
if(color.isValid())
{
this->setTextColor(color);
}
}
//设置文本字体
void TextEditor::SettingTextFontSlot()
{
bool ok;
QFont font = QFontDialog::getFont(&ok, this);
if (ok)
{
QTextCursor cur = this->textCursor();
QString sltStr = cur.selectedText();
this->cut();
QTextCharFormat fmtText;
fmtText.setFont(font);
cur.insertText(sltStr,fmtText);
}
}
//退出前保存文本信息
void TextEditor::SaveSettings()
{
QSettings TextSettings("Mysoft","TextData");
QString html = this->toHtml();
TextSettings.setValue("text",html);
}
//启动时读取信息
void TextEditor::ReadSettings()
{
QSettings TextSettings("Mysoft","TextData");
QString html = TextSettings.value("text").toString();
this->setHtml(html);
}
class TextEdit : public QMainWindow
{
Q_OBJECT
public:
TextEdit(QWidget *parent = 0, Qt::WFlags flags = 0);
~TextEdit();
protected:
void closeEvent ( QCloseEvent * event ) ;
void ReadSettings();
private:
TextEditor *m_pCentralWidget;
};TextEdit::TextEdit(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
m_pCentralWidget = new TextEditor(this);
this->setCentralWidget(m_pCentralWidget);
ReadSettings();
}
TextEdit::~TextEdit()
{
}
void TextEdit::closeEvent( QCloseEvent * event )
{
QSettings dialogSettings("Mysoft","dialogData"); //保存窗口位置和大小
dialogSettings.setValue("Rect",this->rect());
QPoint pos = this->pos();
dialogSettings.setValue("positionX",this->pos().x());
dialogSettings.setValue("positionY",this->pos().y());
m_pCentralWidget->SaveSettings();
}
void TextEdit::ReadSettings()
{
QSettings dialogSettings("Mysoft","dialogData"); //读取窗口位置和大小
dialogSettings.setValue("Rect",this->rect());
dialogSettings.setValue("position",this->pos());
QRect rect = dialogSettings.value("Rect").value<QRect>();
this->setGeometry(rect);
int posX = dialogSettings.value("positionX").toInt();
int posY = dialogSettings.value("positionY").toInt();
this->move(QPoint(posX,posY));
}