EditText插入表情圖片

 

 

 

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <com.javen.smile.SmiliesEditText
        android:id="@+id/EditText1"
        android:layout_width="fill_parent"
        android:layout_height="100px"
        android:singleLine="true"
        android:text="HelloWorld"
        android:textSize="25sp" />

</LinearLayout>

mainActivity

package com.javen.smile;


import com.javen.smile.R;

import android.app.Activity;
import android.os.Bundle;
public class main extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        SmiliesEditText et=(SmiliesEditText)findViewById(R.id.EditText1);
        et.insertIcon(R.drawable.smile);
        
        System.out.println(et.getText().toString());
    }
}

 

 

 

自定義的SmiliesEditText 

package com.javen.smile;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.widget.EditText;

public class SmiliesEditText extends EditText {

    public SmiliesEditText(Context context) {
        super(context);
    }

    public SmiliesEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public void insertIcon(int id) {
        // SpannableString連續的字符串，長度不可變，同時可以附加一些object;可變的話使用SpannableStringBuilder，參考sdk文檔
        SpannableString ss = new SpannableString(getText().toString()+ "[smile]");
        // 得到要顯示圖片的資源
        Drawable d = getResources().getDrawable(id);
        // 設置高度
        d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
        // 跨度底部應與周圍文本的基線對齊
        ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);
        // 附加圖片
        ss.setSpan(span, getText().length(),
                getText().length() + "[smile]".length(),
                Spannable.SPAN_INCLUSIVE_EXCLUSIVE);

        setText(ss);
    }
}