有没有一个聪明的方法让用户在隐藏和查看密码之间切换在一个android EditText? 许多基于PC的应用程序都允许用户这样做。
当前回答
我觉得我想回答这个问题，即使有一些好的答案，
根据文档TransformationMethod完成我们的任务
TransformationMethod TextView使用TransformationMethods来做一些事情，比如替换 字符的密码与点，或保持换行符 避免在单行文本字段中引起换行。
注意我使用黄油刀，但它是相同的，如果用户检查显示密码
@OnCheckedChanged(R.id.showpass)
public void onChecked(boolean checked){
if(checked){
et_password.setTransformationMethod(null);
}else {
et_password.setTransformationMethod(new PasswordTransformationMethod());
}
// cursor reset his position so we need set position to the end of text
et_password.setSelection(et_password.getText().length());
}
其他回答
这是我的解决方案没有使用TextInputEditText和转换方法。
XML
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
style="@style/FormLabel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/username" />
<EditText
android:id="@+id/loginUsername"
style="@style/EditTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/ic_person_outline_black_24dp"
android:drawableStart="@drawable/ic_person_outline_black_24dp"
android:inputType="textEmailAddress"
android:textColor="@color/black" />
<TextView
style="@style/FormLabel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="@string/password" />
<EditText
android:id="@+id/loginPassword"
style="@style/EditTextStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableEnd="@drawable/ic_visibility_off_black_24dp"
android:drawableLeft="@drawable/ic_lock_outline_black_24dp"
android:drawableRight="@drawable/ic_visibility_off_black_24dp"
android:drawableStart="@drawable/ic_lock_outline_black_24dp"
android:inputType="textPassword"
android:textColor="@color/black" />
</LinearLayout>
Java代码
boolean VISIBLE_PASSWORD = false; //declare as global variable befor onCreate()
loginPassword = (EditText)findViewById(R.id.loginPassword);
loginPassword.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
final int DRAWABLE_LEFT = 0;
final int DRAWABLE_TOP = 1;
final int DRAWABLE_RIGHT = 2;
final int DRAWABLE_BOTTOM = 3;
if (event.getAction() == MotionEvent.ACTION_UP) {
if (event.getRawX() >= (loginPassword.getRight() - loginPassword.getCompoundDrawables()[DRAWABLE_RIGHT].getBounds().width())) {
// your action here
//Helper.toast(LoginActivity.this, "Toggle visibility");
if (VISIBLE_PASSWORD) {
VISIBLE_PASSWORD = false;
loginPassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
loginPassword.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_lock_outline_black_24dp, 0, R.drawable.ic_visibility_off_black_24dp, 0);
} else {
VISIBLE_PASSWORD = true;
loginPassword.setInputType(InputType.TYPE_CLASS_TEXT);
loginPassword.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_lock_outline_black_24dp, 0, R.drawable.ic_visibility_black_24dp, 0);
}
return false;
}
}
return false;
}
});
你试过setTransformationMethod吗?它继承自TextView，并希望TransformationMethod作为参数。
你可以在这里找到更多关于TransformationMethods的信息。
它还有一些很酷的功能，比如字符替换。
用复选框显示和隐藏密码Edit_Text
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:inputType="textPassword"
android:id="@+id/edtPass"
android:textSize="20dp"
android:hint="password"
android:padding="20dp"
android:background="#efeaea"
android:layout_width="match_parent"
android:layout_margin="20dp"
android:layout_height="wrap_content" />
<CheckBox
android:background="#ff4"
android:layout_centerInParent="true"
android:textSize="25dp"
android:text="show password"
android:layout_below="@id/edtPass"
android:id="@+id/showPassword"
android:layout_marginTop="20dp"
android:layout_width="wrap_content"
android:gravity="top|right"
android:layout_height="wrap_content" />
</RelativeLayout>
java代码
package com.example.root.sql2;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.AppCompatCheckBox;
import android.support.v7.widget.Toolbar;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
public class password extends AppCompatActivity {
EditText password;
CheckBox show_hide_password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.hide);
findViewById();
show_hide_pass();
}//end onCreate
public void show_hide_pass(){
show_hide_password.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if (!b){
// hide password
password.setTransformationMethod(PasswordTransformationMethod.getInstance());
}else{
// show password
password.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}
}
});
} // end show_hide_pass
public void findViewById(){ // find ids ui and
password = (EditText) findViewById(R.id.edtPass);
show_hide_password = (CheckBox) findViewById(R.id.showPassword);
}//end findViewById
}// end class
首先，这是屏幕加载图像矢量资产可见性
点击它将改变这个图像的可见性关闭
以上密码开关代码(xml代码)
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/laypass"
android:layout_width="330dp"
android:layout_height="50dp"
android:layout_marginTop="24dp"
app:layout_constraintEnd_toEndOf="@+id/editText3"
app:layout_constraintStart_toStartOf="@+id/editText3"
app:layout_constraintTop_toBottomOf="@+id/editText3">
<EditText
android:id="@+id/edit_password"
style="@style/EditTextTheme"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/round"
android:drawableLeft="@drawable/ic_password"
android:drawablePadding="10dp"
android:ems="10"
android:hint="Password"
android:inputType="textPassword"
android:paddingLeft="10dp"
android:paddingRight="15dp"
android:textColor="@color/cyan92a6"
android:textColorHint="@color/cyan92a6"
android:textCursorDrawable="@null"
android:textSize="18sp"
/>
<ImageView
android:id="@+id/show_pass_btn"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginEnd="8dp"
android:alpha=".5"
android:onClick="ShowHidePass"
android:padding="5dp"
android:src="@drawable/ic_visibility"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@+id/laypass"
app:layout_constraintTop_toTopOf="@+id/edit_password" />
</androidx.constraintlayout.widget.ConstraintLayout>
按钮操作的Java代码
public void ShowHidePass(View view) {
if(view.getId()==R.id.show_pass_btn){
if(edit_password.getTransformationMethod().equals(PasswordTransformationMethod.getInstance())){
((ImageView)(view)).setImageResource(R.drawable.ic_visibility_off);
//Show Password
edit_password.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}
else{
((ImageView)(view)).setImageResource(R.drawable.ic_visibility);
//Hide Password
edit_password.setTransformationMethod(PasswordTransformationMethod.getInstance());
}
}
}
private boolean isPasswordVisible;
private TextInputEditText firstEditText;
...
firstEditText = findViewById(R.id.et_first);
...
private void togglePassVisability() {
if (isPasswordVisible) {
String pass = firstEditText.getText().toString();
firstEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
firstEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
firstEditText.setText(pass);
firstEditText.setSelection(pass.length());
} else {
String pass = firstEditText.getText().toString();
firstEditText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
firstEditText.setInputType(InputType.TYPE_CLASS_TEXT);
firstEditText.setText(pass);
firstEditText.setSelection(pass.length());
}
isPasswordVisible= !isPasswordVisible;
}
推荐文章
- 警告:API ' variable . getjavacompile()'已过时，已被' variable . getjavacompileprovider()'取代
- 安装APK时出现错误
- 碎片中的onCreateOptionsMenu
- TextView粗体通过XML文件?
- 如何使线性布局的孩子之间的空间?
- DSL元素android.dataBinding。enabled'已过时，已被'android.buildFeatures.dataBinding'取代
- ConstraintLayout:以编程方式更改约束
- PANIC: AVD系统路径损坏。检查ANDROID_SDK_ROOT值
- 如何生成字符串类型的buildConfigField
- Recyclerview不调用onCreateViewHolder
- Android API 21工具栏填充
- Android L中不支持操作栏导航模式
- 如何在TextView中添加一个子弹符号?
- PreferenceManager getDefaultSharedPreferences在Android Q中已弃用
- 在Android Studio中创建aar文件
