安卓在代码中设置TextView的drawableLeft、drawableRight、drawableTop、drawableBottom，并设置监听

TextView的xml文件：

<AutoCompleteTextView
            android:id="@+id/et_setpwd_userpwd"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_marginTop="54dp"
            android:background="@null"
            android:digits="@string/rule_edit"
            android:drawableRight="@drawable/password"
            android:hint="@string/input_password"
            android:inputType="textPassword"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:singleLine="true"
            android:textSize="16sp" />

其中 android:digits="@string/rule_edit" 为文本过滤：

<string name="rule_edit">0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ`¬!"£$%^*()~=#{}[];':,./?/*-_+&#060;&#062;&#064;&#038;</string>

在代码中如果要修改drawableRight设置的图片可以使用API

void android.widget.TextView.setCompoundDrawables(Drawable left, Drawable top, Drawable right, Drawable bottom)

Drawable可以通过 Drawable rightDrawable = getResources().getDrawable(R.drawable.icon_new); 得到。

但是API提示，setCompoundDrawables() 调用的时候，Drawable对象必须调用setBounds(int left, int top, int right, int bottom)方法，于是我们加一行代码就可以了。

 Drawable drawableSee = getResources().getDrawable(R.drawable.password_see);
                    drawableSee.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
                    adtUserPwd.setCompoundDrawables(null, null, drawableSee, null);

如若为drawableRight设置监听：

adtUserPwd.setOnTouchListener(new onTounchListener());

onTounchListener()代码如下：

private class onTounchListener implements View.OnTouchListener {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // et.getCompoundDrawables()得到一个长度为4的数组，分别表示左右上下四张图片
            Drawable drawable = adtUserPwd.getCompoundDrawables()[2];
            //如果右边没有图片，不再处理
            if (drawable == null)
                return false;
            //如果不是按下事件，不再处理
            if (event.getAction() != MotionEvent.ACTION_UP)
                return false;
            if (event.getX() > adtUserPwd.getWidth()
                    - adtUserPwd.getPaddingRight()
                    - drawable.getIntrinsicWidth()) {
                if (!displayPassWord) {
                    Drawable drawableSee = getResources().getDrawable(R.drawable.password_see);
                    drawableSee.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
                    adtUserPwd.setCompoundDrawables(null, null, drawableSee, null);
//隐藏密码                    
adtUserPwd.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
                } else {
                    Drawable drawableSee = getResources().getDrawable(R.drawable.password);
                    drawableSee.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
                    adtUserPwd.setCompoundDrawables(null, null, drawableSee, null);
                    
//显示密码
adtUserPwd.setTransformationMethod(PasswordTransformationMethod.getInstance());
                }
                displayPassWord = !displayPassWord;
            }
            return false;
        }
    }

文章参考于：https://blog.csdn.net/catoop/article/details/39959175

安卓在代码中设置TextView的drawableLeft、drawableRight、drawableTop、drawableBottom，并设置监听

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