TextView添加链接

TextView添加链接

本文主要介绍TextView添加链接的几种可行及不可行方式，并且分析为什么不可行。示例APK地址TrineaAndroidDemo.apk，效果图如下：





一、可行方式

Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" />trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo);trineaInfoTv.setMovementMethod(LinkMovementMethod.getInstance());Spanned text = Html.fromHtml("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>");trineaInfoTv.setText(text);

显示链接样式，能点击，touch即点击 Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" /> trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo); Spanned text = Html.fromHtml("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>"); trineaInfoTv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Uri web = Uri.parse("http://www.trinea.cn"); Intent i = new Intent(Intent.ACTION_VIEW, web); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); activity.startActivity(i); } });

显示链接样式，能点击。通过手动设置textView的OnClickListener完成点击响应。



Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" android:autoLink="all" />trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo);trineaInfoTv.setText("个人主页:http://www.trinea.cn");

显示链接样式，并且能点击(只响应http://www.trinea.cn部分点击)，不过不支持如下的href形式Java

1	trineaInfoTv.setText("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>");

二、不可行方式

Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" android:autoLink="all" />trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo);Spanned text = Html.fromHtml("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>");trineaInfoTv.setText(text);

显示链接样式，不能点击 Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" /> trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo); Spanned text = Html.fromHtml("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>"); trineaInfoTv.setText(text);

显示链接样式，不能点击



Java

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<TextView android:id="@+id/trineaInfo" android:layout_width="match_parent" android:layout_height="wrap_content" android:autoLink="all" />trineaInfoTv = (Button)activity.findViewById(R.id.trineaInfo);trineaInfoTv.setMovementMethod(LinkMovementMethod.getInstance());Spanned text = Html.fromHtml("个人主页:<a href=\"http://www.trinea.cn\"> Trinea</a>");trineaInfoTv.setText(text);

不显示链接样式，不能点击 三、通过源码分析原因TextView.setText函数主要源代码如下：Java

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if (!isSuggestionUnderLineRefreshFlag) { if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) { Editable t = mEditableFactory.newEditable(text); text = t; setFilters(t, mFilters); InputMethodManager imm = InputMethodManager.peekInstance(); if (imm != null) imm.restartInput(this); } else if (type == BufferType.SPANNABLE || mMovement != null) { text = mSpannableFactory.newSpannable(text); } else if (!(text instanceof CharWrapper)) { text = TextUtils.stringOrSpannedString(text); } } if (mAutoLinkMask != 0) { Spannable s2; if (type == BufferType.EDITABLE || text instanceof Spannable) { s2 = (Spannable) text; } else { s2 = mSpannableFactory.newSpannable(text); } if (Linkify.addLinks(s2, mAutoLinkMask)) { text = s2; type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE; /* * We must go ahead and set the text before changing the * movement method, because setMovementMethod() may call * setText() again to try to upgrade the buffer type. */ mText = text; // Do not change the movement method for text that support text selection as it // would prevent an arbitrary cursor displacement. if (mLinksClickable && !textCanBeSelected()) { setMovementMethod(LinkMovementMethod.getInstance()); } } }