SpannableString 動態設定textView中字型顏色和大小
myTextView = (TextView) this.findViewById(R.id.myTextView);
//建立一個 SpannableString物件
SpannableString sp = new SpannableString("這句話中有百度超連結,有高亮顯示,這樣,或者這樣,還有斜體.");
//設定超連結
sp.setSpan(new URLSpan("http://www.baidu.com"), 5, 7,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
//設定高亮樣式一
sp.setSpan(new BackgroundColorSpan(Color.RED), 17 ,19,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
//設定高亮樣式二
sp.setSpan(new ForegroundColorSpan(Color.YELLOW),20,24,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
//設定斜體
sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 27, 29, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
//SpannableString物件設定給TextView
myTextView.setText(sp);
//設定TextView可點選
myTextView.setMovementMethod(LinkMovementMethod.getInstance());
textview顯示不同的顏色、樣式來表示,需要用到SpannableString物件來處理
下面是從網上找的一段程式碼,已驗證過:
mTextView = (TextView)findViewById(R.id.test);
SpannableString tSS = new SpannableString(“SpannableString學習中”);
tSS.setSpan(new BackgroundColorSpan(Color.RED), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //紅色高亮
tSS.setSpan(new UnderlineSpan(), 15, 18,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //下劃線
tSS.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC), 2, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //斜體
mTextView.setText(tSS);
關鍵方法:
public void setSpan (Object what, int start, int end, int flags)
主要是start跟end
start是起始位置,無論中英文,都算一個。從0開始計算起。end是結束位置,所以處理的文字,包含開始位置,但不包含結束位置。
下面解決點選不同文字跳轉到不同activity的問題:
直接貼程式碼:
package com.feel;
import android.app.Activity;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class TextViewJump2Activity extends Activity {
/** Called when the activity is first created. */
private TextView mClickableText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout layout = new LinearLayout(this);
mClickableText = new TextView(this);
mClickableText.setClickable(true);
mClickableText.setTextSize(20);
layout.addView(mClickableText);
setContentView(layout);
mClickableText.setText(getClickableSpan());
mClickableText.setMovementMethod(LinkMovementMethod.getInstance());
}
private SpannableString getClickableSpan() {
View.OnClickListener l = new View.OnClickListener() {
//如下定義自己的動作
public void onClick(View v) {
Toast.makeText(TextViewJump2Activity.this, "Click Success", Toast.LENGTH_SHORT).show();
//在這裡就可以做跳轉到activity或者彈出對話方塊的操作了
}
};
SpannableString spanableInfo = new SpannableString("This is a test, Click Here!");
int start = 16;
int end = spanableInfo.length();
spanableInfo.setSpan(new Clickable(l), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return spanableInfo;
}
}
class Clickable extends ClickableSpan implements OnClickListener {
private final View.OnClickListener mListener;
public Clickable(View.OnClickListener l) {
mListener = l;
}
@Override
public void onClick(View v) {
mListener.onClick(v);
}
}