Android -- EditText插入表情

public class MainActivity extends Activity {    private EditText ev;    private Button btn;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ev = (EditText) findViewById(R.id.ev);        btn = (Button) findViewById(R.id.btn);        btn.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                int randomId = new Random().nextInt(10);// 产生0--9的随机数                try {                    Field field = R.drawable.class.getDeclaredField("f00"                            + randomId);                    int resourid = Integer.parseInt(field.get(null).toString());                    Bitmap bitmap = BitmapFactory.decodeResource(                            getResources(), resourid);                    ImageSpan imageSpan = new ImageSpan(MainActivity.this,                            bitmap);                    SpannableString spannableString = new SpannableString("f00");                    spannableString.setSpan(imageSpan, 0, 3,                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);                    // 添加文字                    ev.append(spannableString);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }}
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