搭建直播平台，显示隐藏密码，眼睛特效

package com.example.test2;<br>import androidx.appcompat.app.AppCompatActivity;<br>import android.os.Bundle;<br>import android.text.method.HideReturnsTransformationMethod;<br>import android.text.method.PasswordTransformationMethod;<br>import android.view.View;<br>import android.widget.EditText;<br>import android.widget.ImageView;<br>public class MainActivity extends AppCompatActivity implements View.OnClickListener{<br>    private EditText password;<br>    private ImageView imageView;<br>    private boolean flag=true;<br>    private HideReturnsTransformationMethod method_show;<br>    @Override<br>    protected void onCreate(Bundle savedInstanceState) {<br>        super.onCreate(savedInstanceState);<br>        setContentView(R.layout.activity_main);<br>        password = findViewById(R.id.password);<br>        imageView = findViewById(R.id.img);<br>        imageView.setOnClickListener(this);<br>    }<br>    @Override<br>    public void onClick(View v) {<br>        switch (v.getId()){<br>            case R.id.img:<br>                changeImage();<br>        }<br>    }<br>    private void changeImage() {<br>        // todo 每次进入登陆时输入的密码都是隐藏的<br>        PasswordTransformationMethod methodHide=PasswordTransformationMethod.getInstance();<br>        password.setTransformationMethod(methodHide);<br>        if(flag){<br>            imageView.setImageDrawable(this.getResources().getDrawable(R.drawable.eye1));<br>            flag=false;<br>            // todo 隐藏密码<br>            PasswordTransformationMethod method_hide = PasswordTransformationMethod.getInstance();<br>            password.setTransformationMethod(method_hide);<br>        }<br>        else{<br>            imageView.setImageDrawable(this.getResources().getDrawable(R.drawable.eye2));<br>            flag=true;<br>            // todo  显示密码<br>            method_show= HideReturnsTransformationMethod.getInstance();<br>            password.setTransformationMethod(method_show);<br>        }<br>        if (!password.getText().toString().trim().equals("")) {<br>            password.setSelection(password.getText().toString().trim().length());//将光标移至文字末尾<br>        }<br>    }<br>}