使用下面的代码

    val hidePasswordMethod = PasswordTransformationMethod()
    showOrHidePasswordButton.setOnClickListener {
        passwordEditText.apply {
            transformationMethod =
                if (transformationMethod is PasswordTransformationMethod) 
                   null //shows password
               else 
                   hidePasswordMethod //hides password
        }
    }

并确保你把它添加到你的密码编辑文本在布局

    android:inputType="textPassword"

如果你想要一个简单的解决方案，你可以使用这个扩展的Android的EditText去这个链接了解更多信息:https://github.com/scottyab/showhidepasswordedittext

将此添加到build.gradle中: 实现“com.github.scottyab: showhidepasswordedittext: 0.8”

然后更改XML文件中的EditText。

来自:< EditText

: < com.scottyab.showhidepasswordedittext.ShowHidePasswordEditText

这是所有。

注意:在XML设计中无法看到它，请尝试在模拟器或物理设备中运行它。

试试这个:

passwordEditText.setInputType(1);

Or

passwordEditText.setInputType(InputType.TYPE_CLASS_TEXT);

试试这个:

首先定义一个全局标志，如下所示:

private boolean isShowPassword = false;

并设置监听器处理点击显示和隐藏密码按钮:

imgPassword.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (isShowPassword) {
                    etPassword.setTransformationMethod(new PasswordTransformationMethod());
                    imgPassword.setImageDrawable(getResources().getDrawable(R.drawable.ic_eye_hide));
                    isShowPassword = false;
                }else{
                    etPassword.setTransformationMethod(null);
                    imgPassword.setImageDrawable(getResources().getDrawable(R.drawable.ic_eye_show));
                    isShowPassword = true;
                }
            }
        });

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;
}

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());
        }
    }
}