assistant-android/app/src/main/java/com/gh/gamecenter/LoginActivity.java

package com.gh.gamecenter;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.content.ContextCompat;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.gh.base.BaseActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.common.util.PatternUtils;

import butterknife.BindView;
import butterknife.OnClick;

/**
 * Created by khy on 19/06/17.
 */

public class LoginActivity extends BaseActivity {


    @BindView(R.id.login_phone_et)
    EditText mLoginPhoneEt;
    @BindView(R.id.login_pass_et)
    EditText mLoginPassEt;
    @BindView(R.id.login_captcha)
    TextView mLoginCaptcha;
    @BindView(R.id.login_hint)
    TextView mLoginHint;

    Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 0) {
                int arg1 = msg.arg1;
                arg1--;
                if (arg1 >= 0) {
                    Message message = new Message();
                    message.what = 0;
                    message.arg1 = arg1;
                    mHandler.sendMessageDelayed(message, 1000);
                    mLoginCaptcha.setText(String.valueOf(arg1));
                } else {
                    mLoginCaptcha.setText("重新获取");
                    mLoginCaptcha.setTextColor(ContextCompat.getColor(LoginActivity.this, R.color.title));
                    mLoginCaptcha.setBackgroundResource(R.drawable.border_black_bg);
                    mLoginCaptcha.setEnabled(true);
                }
            }
        }
    };

    @Override
    protected int getLayoutId() {
        return R.layout.activity_login;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initTitle("登录光环助手");

        // 添加老用户入口
        ImageView oldUser = new ImageView(this);
        oldUser.setImageResource(R.drawable.login_olduser_icon);
        oldUser.setPadding(DisplayUtils.dip2px(this, 13), DisplayUtils.dip2px(this, 11)
                , DisplayUtils.dip2px(this, 11), DisplayUtils.dip2px(this, 13));
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
                DisplayUtils.dip2px(this, 48), DisplayUtils.dip2px(this, 48));
        params.addRule(RelativeLayout.CENTER_VERTICAL);
        params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        RelativeLayout reuseActionbar = (RelativeLayout) mContentView.findViewById(
                R.id.reuse_actionbar);
        reuseActionbar.addView(oldUser, params);
        

        mLoginPassEt.addTextChangedListener(new LoginTextWatcher(mLoginPassEt));
        mLoginPhoneEt.addTextChangedListener(new LoginTextWatcher(mLoginPhoneEt));


        oldUser.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toast("老用户入口");
            }
        });
    }

    @OnClick({R.id.login_captcha, R.id.login_hint})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.login_captcha:
                String phoneNum = mLoginPhoneEt.getText().toString().trim();
                if (PatternUtils.isPhoneNum(phoneNum)) {
                    Message message = new Message();
                    message.what = 0;
                    message.arg1 = 10;
                    mHandler.sendMessage(message);
                    mLoginCaptcha.setTextColor(ContextCompat.getColor(LoginActivity.this, R.color.hint));
                    mLoginCaptcha.setBackgroundResource(R.drawable.border_captcha_bg);
                    mLoginCaptcha.setEnabled(false);
                } else {
                    toast("请输入正确的手机号");
                }
                break;
            case R.id.login_hint:
                break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mHandler.removeCallbacksAndMessages(null);
    }

    private class LoginTextWatcher implements TextWatcher {
        private EditText mEditText;

        public LoginTextWatcher(EditText e) {
            mEditText = e;
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            Drawable drawable;
            int tvCount = s.length();
            if (mEditText == mLoginPassEt) {
                if (tvCount > 0) {
                    drawable = ContextCompat.getDrawable(LoginActivity.this, R.drawable.login_password_focused);
                } else {
                    drawable = ContextCompat.getDrawable(LoginActivity.this, R.drawable.login_password_unfocused);
                }
            } else {
                if (tvCount > 0) {
                    drawable = ContextCompat.getDrawable(LoginActivity.this, R.drawable.login_phone_focused);
                } else {
                    drawable = ContextCompat.getDrawable(LoginActivity.this, R.drawable.login_phone_unfocused);
                }
            }
            drawable.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
            mEditText.setCompoundDrawables(drawable, null, null, null);
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    }
}