让 TextView 的事件响应支持 Intent

按上一篇的方式可以给 TextView 加上事件响应，然而仅限于 web、email、phone、map等几种，如果希望在点击后跳转到自己的 Activity 要怎么实现呢？看代码吧！

 

这是 Activity 代码：

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        linkify = new LinkifyUtil(this);
        Intent intent = new Intent("com.example.android.note.ADD");
        intent.setData(Uri.parse("content://com.example.android.note/item"));
        
        linkify.addIntentLink(intent, (TextView) findViewById(R.id.tv_new_item));
    }

 

这是 LinkifyUtil 类：

package com.example.android.note.util;

import android.app.Activity;
import android.content.Intent;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

/**
 *
 * @author eidolon
 */
public class LinkifyUtil {
    private final Activity currentActivity;

    public LinkifyUtil(Activity activity) {
        this.currentActivity = activity;
    }

    public void addIntentLink(final Intent intent, final TextView view, final int start, final int end) {
        CharSequence source = view.getText();
        if (source instanceof Spanned) {
            IntentSpan[] spans = ((Spanned) source).getSpans(start, end, IntentSpan.class);
            if (spans.length > 0) {
                return;
            }
        }
        
        SpannableString spannableString = new SpannableString(source);
        spannableString.setSpan(new IntentSpan(new OnClickListener() {

            public void onClick(View view) {
                currentActivity.startActivity(intent);
            }
        }), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        
        view.setText(spannableString);
        view.setMovementMethod(LinkMovementMethod.getInstance());
    }

    public void addIntentLink(final Intent intent, final TextView view) {
        addIntentLink(intent, view, 0, view.getText().toString().length());
    }
}

 

最后是 IntentSpan 类：

package com.example.android.note.util;

import android.text.style.ClickableSpan;
import android.view.View;
import android.view.View.OnClickListener;

/**
 *
 * @author eidolon
 */
public class IntentSpan extends ClickableSpan {

    private final OnClickListener listener;

    public IntentSpan(View.OnClickListener listener) {
        this.listener = listener;
    }

    @Override
    public void onClick(View view) {
        listener.onClick(view);
    }
}