Android QQ登录界面绘制代码
先看看效果图:
首先过程中碰到的几个问题:
1、对 EditText 进行自定义背景
2、运行时自动 EditText 自动获得焦点
3、在获得焦点时即清空 hint ,而不是输入后清空
4、清空按钮的出现时机(在得到焦点并且有输入内容时)
--- 这些问题都有一一解决 ---
以下是代码:
布局 fragment_main(问题2)
<!-- android:focusable="true" android:focusableInTouchMode="true" 把EditText默认的行为截断了! --> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ECEDF1" android:focusable="true" android:focusableInTouchMode="true" tools:context="com.dragon.android.qqlogin.MainActivity$PlaceholderFragment" > <ImageView android:id="@+id/imageView1" android:layout_width="70dp" android:layout_height="70dp" android:layout_centerHorizontal="true" android:layout_marginBottom="5dp" android:layout_marginTop="40dp" android:src="@drawable/a" /> <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/imageView1" android:ems="10" android:background="@drawable/bg_edittext" android:inputType="textPersonName" android:gravity="center" android:textColor="#6A6A6C" android:hint="@string/inaccount" android:textColorHint="#ECEDDD"> </EditText> <EditText android:id="@+id/editText2" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/editText1" android:ems="10" android:background="@drawable/bg_edittext" android:inputType="textPassword" android:gravity="center" android:textColor="#6A6A6C" android:hint="@string/inpwd" android:textColorHint="#ECEDDD" > </EditText> <Button android:id="@+id/button1" android:layout_width="match_parent" android:layout_height="40dp" android:layout_below="@id/editText2" android:layout_marginLeft="20dp" android:layout_marginRight="20dp" android:layout_marginTop="10dp" android:background="@drawable/bg_button" android:text="@string/button" android:gravity="center" android:textColor="#F9FAFB" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:padding="10dp" > <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="@string/faillogin" android:textColor="#0EB1EF" /> <TextView android:id="@+id/textView3" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="right" android:text="@string/regist" android:textColor="#0EB1EF" /> </LinearLayout> <Button android:id="@+id/button2" android:layout_width="16dp" android:layout_height="16dp" android:layout_alignTop="@id/editText1" android:layout_marginTop="15dp" android:layout_alignParentRight="true" android:layout_marginRight="10dp" android:background="@drawable/clear" android:visibility="invisible" /> <Button android:id="@+id/button3" android:layout_width="16dp" android:layout_height="16dp" android:layout_alignTop="@id/editText2" android:layout_marginTop="15dp" android:layout_alignLeft="@+id/button2" android:background="@drawable/clear" android:visibility="invisible" /> </RelativeLayout>
Button 和 EditText 的背景(问题1)
1.bg_button
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <stroke android:width="1px" android:color="#00ACED" /> <solid android:color="#00ACED" /> <corners android:radius="10dp" /> </shape>
2.bg_edittext
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <stroke android:width="1px" android:color="#ECEDF1" /> <solid android:color="#F9FAFB" /> <corners android:radius="10dp" /> <padding android:top="10dp" android:bottom="10dp"/> </shape>
3.strings
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">qqloginnew</string> <string name="action_settings">Settings</string> <string name="button">登录</string> <string name="faillogin">无法登录?</string> <string name="regist">新用户注册</string> <string name="inaccount">QQ号/手机号/邮箱</string> <string name="inpwd">密码</string> <string name="sucess">登录成功</string> </resources>
MainActivity (问题3、4.....)
package com.dragon.android.qqloginnew; import android.app.Activity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnFocusChangeListener; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { private EditText editText1; private EditText editText2; // private Button button; private Button clearButton1; private Button clearButton2; // 得到strings中的属性 // private String string2 = getResources().getString(R.string.inaccount); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_main); editText1 = (EditText) findViewById(R.id.editText1); editText2 = (EditText) findViewById(R.id.editText2); // button = (Button) findViewById(R.id.button1); clearButton1 = (Button) findViewById(R.id.button2); clearButton2 = (Button) findViewById(R.id.button3); // 对EditText进行焦点变更监听 editText1.setOnFocusChangeListener(new EditTextListener(clearButton1)); editText2.setOnFocusChangeListener(new EditTextListener(clearButton2)); // 对清空按钮进行点击监听 clearButton1.setOnClickListener(new ClearButtonListener()); clearButton2.setOnClickListener(new ClearButtonListener()); // 对EditText进行编辑监听 editText1.addTextChangedListener(new MyEditTextWatcher(editText1)); editText2.addTextChangedListener(new MyEditTextWatcher(editText2)); } /** * 对EditText的内容进行实时监控 * * @author Auser * */ class MyEditTextWatcher implements TextWatcher { private CharSequence temp; private EditText editText; public MyEditTextWatcher(EditText editText) { this.editText = editText; } @Override // int start开始的位置, int count被改变的旧内容数, int after改变后的内容数量 public void beforeTextChanged(CharSequence s, int start, int count, int after) { // 这里的s表示改变之前的内容,通常start和count组合,可以在s中读取本次改变字段中被改变的内容。而after表示改变后新的内容的数量。 } @Override // int start开始的位置, int before改变前的内容数量, int count新增量 public void onTextChanged(CharSequence s, int start, int before, int count) { // 这里的s表示改变之后的内容,通常start和count组合,可以在s中读取本次改变字段中新的内容。而before表示被改变的内容的数量。 temp = s; } @Override // 表示最终内容 public void afterTextChanged(Editable s) { if (temp.length() > 0) { // 设置清空按钮为可见 if (editText == editText1) { clearButton1.setVisibility(View.VISIBLE); } else if (editText == editText2) { clearButton2.setVisibility(View.VISIBLE); } } else { // 设置清空按钮不可见 if (editText == editText1) { clearButton1.setVisibility(View.INVISIBLE); } else if (editText == editText2) { clearButton2.setVisibility(View.INVISIBLE); } } } } /** * 清空按钮点击事件 * * @author * */ class ClearButtonListener implements OnClickListener { @Override public void onClick(View view) { if (view == clearButton1) { editText1.setText(""); } else if (view == clearButton2) { editText2.setText(""); } } } /** * 焦点变更事件 * * @author Auser * */ class EditTextListener implements OnFocusChangeListener { private Button clear; public EditTextListener(Button clear) { this.clear = clear; } @Override public void onFocusChange(View v, boolean hasFocus) { EditText textView = (EditText) v; String hint; if (hasFocus) { // 当获取焦点时如果内容不为空则清空按钮可见 if (!textView.getText().toString().equals("")) { clear.setVisibility(View.VISIBLE); } // if (textView == editText2) { // // 设置输入格式为不可见的密码格式 // textView.setInputType(InputType.TYPE_CLASS_TEXT // | InputType.TYPE_TEXT_VARIATION_PASSWORD); // } hint = textView.getHint().toString(); // 给TextView添加额外的数据 textView.setTag(hint); textView.setHint(""); } else { // 当失去焦点时清空按钮不可见 clear.setVisibility(View.INVISIBLE); // if (textView == editText2) { // // 设置输入格式为可见的密码格式 // textView.setInputType(InputType.TYPE_CLASS_TEXT // | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD); // } // 取出之前添加的额外数据 hint = textView.getTag().toString(); textView.setHint(hint); } } } }
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