TextInputLayout 基础样式、错误提示、字数限制等等
效果图：
【2020-12-13】Theme切换到MaterialComponents之后，是有一些变化的，比如默认背景、默认padding等，具体改动可去github查看。
布局文件
<android.support.design.widget.TextInputLayout android:id="@+id/til_name" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginEnd="8dp" android:layout_marginStart="8dp" android:layout_marginTop="8dp" app:counterEnabled="true" app:counterMaxLength="3" app:counterOverflowTextAppearance="@style/MyOverflowText" app:errorEnabled="true" app:errorTextAppearance="@style/MyErrorText" app:hintTextAppearance="@style/MyHintText" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/include"> <android.support.design.widget.TextInputEditText android:id="@+id/et_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/hint_name" android:theme="@style/MyEditText" /> </android.support.design.widget.TextInputLayout> <android.support.design.widget.TextInputLayout android:id="@+id/til_password" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginEnd="8dp" android:layout_marginStart="8dp" android:layout_marginTop="8dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/til_name" app:passwordToggleEnabled="true" app:passwordToggleTint="@color/colorPrimary"> <android.support.design.widget.TextInputEditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/hint_password" android:inputType="textPassword" /> </android.support.design.widget.TextInputLayout>
1、修改默认样式
style：
<!--Floating label text style--> <style name="MyHintText" parent="TextAppearance.AppCompat.Small"> <item name="android:textColor">@color/colorPrimary</item> </style> <!--Input field style--> <style name="MyEditText" parent="Theme.AppCompat.Light"> <item name="colorControlNormal">@color/gray</item> <item name="colorControlActivated">@color/colorPrimary</item> <item name="android:textSize">18sp</item> </style>
然后分别设置
TextInputLayout：
app:hintTextAppearance="@style/MyHintText"
TextInputEditText：
android:theme="@style/MyEditText"
2、错误提示样式及代码设置
style：
<!--Error label text style--> <style name="MyErrorText" parent="TextAppearance.AppCompat.Small"> <item name="android:textColor">@color/red</item> </style>
然后设置
app:errorEnabled="true" app:errorTextAppearance="@style/MyErrorText"
代码控制，设置输入监听
mEtName.addTextChangedListener(mTextWatcher); --------------------------------------------- private TextWatcher mTextWatcher = new TextWatcher() { @Override public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { } @Override public void afterTextChanged(Editable editable) { if (mTilName.getEditText().getText().length() > mTilName.getCounterMaxLength()) mTilName.setError("输入内容超过上限");//show else mTilName.setError(null);//hide } };
3、字数限制
style：
<!--Overflow label text style--> <style name="MyOverflowText" parent="TextAppearance.AppCompat.Small"> <item name="android:textColor">@color/orange</item> </style>
然后设置
app:counterEnabled="true" app:counterMaxLength="3" app:counterOverflowTextAppearance="@style/MyOverflowText"
根据单词字面意思都能看的懂吧，就不一一解释了吧。。
在上面的“错误提示”中，有一段判断是这样的
if (mTilName.getEditText().getText().length() > mTilName.getCounterMaxLength())
mTilName是TextInputLayout，getEditText()方法可以获取子控件TextInputEditText。
getCounterMaxLength()方法可以获取字数限制的最大值。
4、密码样式
先设置TextInputEditText
android:inputType="textPassword"
然后设置TextInputLayout
app:passwordToggleEnabled="true" app:passwordToggleTint="@color/colorPrimary"
app:passwordToggleTint是换图标的颜色
换图标是app:passwordToggleDrawable
app:passwordToggleDrawable="@drawable/ic_password"
