EditText记录

1. 带删除按钮到EditText

import android.content.Context;import android.graphics.drawable.Drawable;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.animation.Animation;import android.view.animation.CycleInterpolator;import android.view.animation.TranslateAnimation;import android.widget.EditText;import com.example.huangjunjie.myapplication3.R;/** * Created by huangjunjie on 15-1-3. */public class ClearEditText extends EditText implements View.OnFocusChangeListener, TextWatcher {    /** * 删除按钮的引用 */    private Drawable mClearDrawable;    public ClearEditText(Context context) {        this(context, null);    }    public ClearEditText(Context context, AttributeSet attrs) {//这里构造方法也很重要，不加这个很多属性不能再XML里面定义        this(context, attrs, android.R.attr.editTextStyle);    }    public ClearEditText(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    private void init() {//获取EditText的DrawableRight,假如没有设置我们就使用默认的图片        mClearDrawable = getCompoundDrawables()[2];        if (mClearDrawable == null) {            mClearDrawable = getResources() .getDrawable(R.drawable.icon_clear_edittext);        }        mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());        setClearIconVisible(false);        setOnFocusChangeListener(this);        addTextChangedListener(this);    }    /** * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件 * 当我们按下的位置 在 EditText的宽度 - 图标到控件右边的间距 - 图标的宽度 和 * EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向没有考虑 */    @Override    public boolean onTouchEvent(MotionEvent event) {        if (getCompoundDrawables()[2] != null) {            if (event.getAction() == MotionEvent.ACTION_UP) {                boolean touchable = event.getX() > (getWidth() - getPaddingRight() - mClearDrawable.getIntrinsicWidth()) && (event.getX() < ((getWidth() - getPaddingRight())));                if (touchable) {                    this.setText("");                }            }        }        return super.onTouchEvent(event);    }    /** * 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏 */    @Override    public void onFocusChange(View v, boolean hasFocus) {        if (hasFocus) {            setClearIconVisible(getText().length() > 0);        } else {            setClearIconVisible(false);        }    }    /** * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去 * @param visible */    protected void setClearIconVisible(boolean visible) {        Drawable right = visible ? mClearDrawable : null;        setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]);    }    /** * 当输入框里面内容发生变化的时候回调的方法 */    @Override    public void onTextChanged(CharSequence s, int start, int count, int after) {        setClearIconVisible(s.length() > 0);    }    @Override    public void beforeTextChanged(CharSequence s, int start, int count, int after) {    }    @Override    public void afterTextChanged(Editable s) {    }    /** * 设置晃动动画 */    public void setShakeAnimation(){        this.setAnimation(shakeAnimation(5));    }    /** * 晃动动画 * @param counts 1秒钟晃动多少下 * @return */    public static Animation shakeAnimation(int counts){        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);        translateAnimation.setInterpolator(new CycleInterpolator(counts));        translateAnimation.setDuration(1000);        return translateAnimation;    }}

2.EditText获取光标位置并插入字符删除字符

参考：http://blog.csdn.net/centralperk/article/details/8548075

1）获取光标位置

int index = editText.getSelectionStart(); 

2）在光标处插入字符

int index = editText.getSelectionStart();  Editable editable = editText.getText();  editable.insert(index, "aaaa");  

3）删除光标前字符

int index = editText.getSelectionStart();  Editable editable = editText.getText();  editable.delete(index-1, index);  

3.隐藏光标

转自：http://orgcent.com/android-edittext-cursor-position-focus/

EditText et = (EditText) findViewById(R.id.etTest);//设置光标不显示,但不能设置光标颜色et.setCursorVisible(false);

4.获得焦点时全选文本

EditText et = (EditText) findViewById(R.id.etTest);et.setSelectAllOnFocus(true);

5.获取和失去焦点

EditText et = (EditText) findViewById(R.id.etTest);et.requestFocus(); //请求获取焦点et.clearFocus(); //清除焦点

6.设置不显示键盘

editText为目标控件

//set not display the keyboard        try {            Class<?> editTextClass = EditText.class;            Method setShowInputMethod = editTextClass.getMethod("setShowSoftInputOnFocus",                    boolean.class);            try {                setShowInputMethod.invoke(editText, false);            } catch (IllegalAccessException e) {                e.printStackTrace();            } catch (InvocationTargetException e) {                e.printStackTrace();            }        } catch (NoSuchMethodException e) {            e.printStackTrace();        }

7.设置EditText最大可输入字符

http://blog.csdn.net/qqgrid/article/details/44301219