EditText

1.去掉下面的横线

加个背景即可

设置选中时背景
http://www.jianshu.com/p/7257ce82c762

android:background="@null"
android:drawableBottom="@drawable/selector_edittext_line"

2.点击Activity任意地方关闭软键盘

http://www.it165.net/pro/html/201405/13742.html

3.设置光标位置

setSelection(addressBean.uname.length());

4.addTextChangedListener监听的死循环问题

https://blog.csdn.net/qq_21229739/article/details/50896029
在afterTextChanged方法里定义boolean标记变量

5.修改键盘里的回车

http://blog.csdn.net/wang_shaner/article/details/8467688

EditText中imeOptions属性使用及设置无效解决
http://blog.csdn.net/lastdream/article/details/24365633
经过试验 设置下面两个属性中的一个即可使这个属性生效（应该还有其他的属性也可以,没去试验）
1 将singleLine设置为true
2 将inputType设置为text

6.不触摸EditText就弹出软键盘

http://www.360doc.com/content/14/0722/10/11800748_396211794.shtml

etMainContent.requestFocus();
InputMethodManager  imm = (InputMethodManager) etMainContent.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(0, InputMethodManager.SHOW_FORCED);

7.默认让某个EditText获取焦点

searchView.setFocusable(true);
searchView.setFocusableInTouchMode(true);
searchView.requestFocus();

searchView.clearFocus();//失去焦点
searchView.requestFocus();//获取焦点

8.带删除的EditText

http://blog.csdn.net/xuyonghong1122/article/details/46663601#

http://blog.csdn.net/xiaanming/article/details/11066685/

9.限制EditText输入小数点后面位数

https://blog.csdn.net/b7223058/article/details/77839556

10.改变光标

1.在资源文件drawable下新建一个光标控制color_cursor.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <size android:width="1dp" />
    <solid android:color="#008000"  />
</shape>

2.设置EditText：android:textCursorDrawable="@drawable/color_cursor"

11.将密码显示的点号改成*号

https://blog.csdn.net/weixin_33541245/article/details/117840731

EditText UPL =(EditText) findViewById(R.id.UserPasswordToLogin) ;
UPL.setTransformationMethod(new AsteriskPasswordTransformationMethod());

然后创建一个新的Java类，名为AsteriskPasswordTransformationMethod.java延伸

这里是代码：

public class AsteriskPasswordTransformationMethod extends PasswordTransformationMethod {
    @Override

    public CharSequence getTransformation(CharSequence source, View view) {
        return new PasswordCharSequence(source);

    }

    private class PasswordCharSequence implements CharSequence {
        private CharSequence mSource;

        public PasswordCharSequence(CharSequence source) {
            mSource = source; // Store char sequence
        }

        @Override
        public char charAt(int index) {
            return '*'; // This is the important part
        }

        @Override
        public int length() {
            return mSource.length(); // Return default

        }

        @Override
        public CharSequence subSequence(int start, int end) {
            return mSource.subSequence(start, end); // Return default
        }
    }

}

12.明文与密文显示

 if (isChecked) {
    //明文
mBinding.editText.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
mBinding.editText.setTransformationMethod(null);
 } else {
     //密码 TYPE_CLASS_TEXT 和 TYPE_TEXT_VARIATION_PASSWORD 必须一起使用
     mBinding.editText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
     //将密码输入框的点号变成*号
     mBinding.editText.setTransformationMethod(asteriskPasswordTransformationMethod);
 }

当设置明文与密文时，光标会自动跳到头，如何解决。

原因：首先上面的这段代码会引起EditText的onSelectionChanged方法回调(0,0)
自定义EditTextView，记录光标位置。

public class CursorWatchEditTextView extends androidx.appcompat.widget.AppCompatEditText {
    /**
     * 是否记录光标位置.
     * 明密文切换时会触发{@link #onSelectionChanged(int, int)}
     * 时，此时不应该记录.
     */
    private boolean recordCursorIndex = true;

    /**
     * 光标位置 .
     */
    private int cursorIndex = 0;

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

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

    public CursorWatchEditTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onSelectionChanged(int selStart, int selEnd) {
        super.onSelectionChanged(selStart, selEnd);
        LogUtils.d("TAG", "onSelectionChanged selStart = " + selStart + ",selEnd = " + selEnd);
        if (recordCursorIndex) {
            this.cursorIndex = selStart;
        } else {
            LogUtils.d("TAG", "onSelectionChanged but recordCursorIndex is false");
        }
    }

    public void setRecordCursorIndex(boolean recordCursorIndex) {
        this.recordCursorIndex = recordCursorIndex;
    }

    /**
     * 恢复光标位置.
     */
    public void restoreCurPosition() {
        setSelection(cursorIndex);
    }
}

然后执行

//不记录光标变化
mBinding.editText.setRecordCursorIndex(false);
执行明密文设置方法（引起光标变化）
//记录光标变化
mBinding.editText.setRecordCursorIndex(true);
//恢复光标位置
mBinding.editText.restoreCurPosition();

//密码是否可见控制 .
            mBinding.cbInputVisible.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    mBinding.editText.setRecordCursorIndex(false);
                    if (isChecked) {
                        //明文
                        mBinding.editText.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
                        mBinding.editText.setTransformationMethod(null);
                    } else {
                        //密码 TYPE_CLASS_TEXT 和 TYPE_TEXT_VARIATION_PASSWORD 必须一起使用
                        mBinding.editText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
                        //将密码输入框的点号变成*号
                        mBinding.editText.setTransformationMethod(asteriskPasswordTransformationMethod);
                    }
                    mBinding.editText.setRecordCursorIndex(true);
                    mBinding.editText.restoreCurPosition();
                }
            });