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

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。

Demo APK 可以方便的查看效果，在各大应用商店搜索 trinea android 下载即可，如：Google Play。

效果图如下：

一、可行方式

<TextView
    android:id="@+id/trineaInfo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
trineaInfoTv = (TextView)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);

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

trineaInfoTv = (TextView)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

<TextView
    android:id="@+id/trineaInfo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
trineaInfoTv = (TextView)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);
    }
});

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

trineaInfoTv = (TextView)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。

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

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:autoLink="all" />

trineaInfoTv = (TextView)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

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

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

二、不可行方式

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

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:autoLink="all" />

trineaInfoTv = (TextView)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

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

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

trineaInfoTv = (TextView)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

<TextView
    android:id="@+id/trineaInfo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:autoLink="all" />
trineaInfoTv = (TextView)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);

<TextView

android:id="@+id/trineaInfo"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:autoLink="all" />

trineaInfoTv = (TextView)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：

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());
                }
            }
        }

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());

}

Trinea

Author of the Dev Tools App, https://coolapk.com/apk/cn.trinea.android.developertools

TextView添加链接

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