情境
如果想讓TextView上面的文字能跟自動判斷是否有 Email、電話或者網址
並且讓它自動標示為超連結, 應該怎麼做?
其實, TextView早就幫你做好了!
因此只需要幾行文字, 就可以讓你完成這個簡單的功能。
程式碼說明
首先我們先設定三個元件, 分別是TextView、EditText跟Button。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.givemepass.autolinkdemo.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/text_view"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/input_text"
android:id="@+id/edit_text" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/button_text"
android:id="@+id/send_button" />
</LinearLayout>
然後只需要在Activity內寫入一個事件, 就可以完成這次簡單的功能了。
public class MainActivity extends AppCompatActivity {
private Button sendBtn;
private TextView textView;
private EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sendBtn = (Button)findViewById(R.id.send_button);
textView = (TextView)findViewById(R.id.text_view);
editText = (EditText)findViewById(R.id.edit_text);
textView.setAutoLinkMask(Linkify.ALL);
sendBtn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
textView.setText(editText.getText().toString());
}
});
}
}我們的重點放在TextView的內建屬性, 根據官網顯示
public final void setAutoLinkMask (int mask)
Added in API level 1
Sets the autolink mask of the text. See Linkify.ALL and peers for possible values.
Related XML Attributes
android:autoLink官方網站的TextView可以使用AutoLink這個屬性, 他會將TextView內的文字自動轉換成超連結。
利用Linkify這個類別的參數來設定mask。
int ALL Bit mask indicating that all available patterns should be matched in methods that take an options mask
int EMAIL_ADDRESSES Bit field indicating that email addresses should be matched in methods that take an options mask
int MAP_ADDRESSES Bit field indicating that street addresses should be matched in methods that take an options mask
int PHONE_NUMBERS Bit field indicating that phone numbers should be matched in methods that take an options mask
int WEB_URLS Bit field indicating that web URLs should be matched in methods that take an options mask
選擇ALL, 代表可以將以上四種功能都抓到。
一般文字
網址
信箱
