Android仿QQ登陸窗口實現原理

2020-04-11 12:36:59

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來源：轉載

供稿：網友

今天根據騰訊qq，我們做一個練習，來學習如何制作一個漂亮的布局。首先看一下官方圖片

還是一個啟動畫面，之后進入登錄頁面，導航頁面就不介紹了，大家可以參考微信的導航頁面。首先程序進入SplashActivity，就是啟動頁面，Activity代碼如下：

復制代碼代碼如下:

package com.example.imitateqq; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.os.Handler; 

public class SplashActivity extends Activity { 

private Intent intent; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.splash); 
startMainAvtivity(); 
} 

private void startMainAvtivity() { 
new Handler().postDelayed(new Runnable() { 
public void run() { 
intent=new Intent(SplashActivity.this,QQ.class); 
startActivity(intent); 
SplashActivity.this.finish();//結束本Activity 
} 
}, 1000);//設置執行時間 
} 
}

xml布局文件就是一個全屏的圖片，要注意的是設置android:scaleType ="matrix"這個屬性。不然不會全屏

復制代碼代碼如下:

<? xml version= "1.0" encoding = "utf-8"?> 
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android" 
android:layout_width= "match_parent" 
android:layout_height= "match_parent" 
android:orientation= "vertical" > 
< ImageView 
android:layout_width ="match_parent" 
android:layout_height ="match_parent" 
android:scaleType ="matrix" 
android:src ="@drawable/splash" /> 
</ LinearLayout>

過1秒之后轉入登陸頁面，從圖片我們可以看出，騰訊的UI做的還是相當美觀漂亮的，既簡潔又不失美觀。先分析一下這個登錄界面，從整體可以看出，根布局的背景色是藍色的，而那個QQ 2012 Android其實是一個圖片背景色和根布局的背景色一樣，這樣就不會有視覺偏差。下面就是兩個文本框EditText了，注意這里和官方給的不一樣，因為后面有一個小箭頭，當點擊這個箭頭時，會在第一個文本框的下面顯示已經輸入的qq號碼，在qq號碼的后面還有刪除qq信息的按鈕。這個地方需要注意一下。再往下就是登陸Button以及那連個“記住密碼”和“注冊新賬號”比較簡單，注意位置的安排即可。最后就是最下面的“更多登陸選項”，當點擊的時候會向上彈出一些內容，其實就是一個隱藏的布局，當點擊上面的時候，使下面隱藏的布局顯示。當然也可以使用滑動抽屜來做，但是相對來說比較麻煩。下面看一下xml代碼，相信大家就會一路了然。

復制代碼代碼如下:

< 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= "@drawable/login_bg" > 

< ImageView 
android:id ="@+id/loginbutton" 
android:layout_width ="wrap_content" 
android:layout_height ="wrap_content" 
android:layout_centerHorizontal ="true" 
android:layout_marginTop ="50dp" 
android:src ="@drawable/login_pic" /> 

<LinearLayout 
android:id ="@+id/input" 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:layout_below ="@id/loginbutton" 
android:layout_marginLeft ="28.0dip" 
android:layout_marginRight ="28.0dip" 
android:background ="@drawable/login_input" 
android:orientation ="vertical" > 

< LinearLayout 
android:layout_width ="fill_parent" 
android:layout_height ="44.0dip" 
android:background ="@drawable/login_input" 
android:gravity ="center_vertical" 
android:orientation ="horizontal" > 

< EditText 
android:id ="@+id/searchEditText" 
android:layout_width ="0dp" 
android:layout_height ="fill_parent" 
android:layout_weight ="1" 
android:background ="@null" 
android:ems ="10" 
android:imeOptions ="actionDone" 
android:singleLine ="true" 
android:textSize ="16sp" > 

< requestFocus /> 
</ EditText> 

< Button 
android:id ="@+id/button_clear" 
android:layout_width ="20dip" 
android:layout_height ="20dip" 
android:layout_marginRight ="8dip" 
android:background ="@drawable/login_input_arrow" 
android:visibility ="visible" /> 
</ LinearLayout> 

< View 
android:layout_width ="fill_parent" 
android:layout_height ="1.0px" 
android:layout_marginLeft ="1.0px" 
android:layout_marginRight ="1.0px" 
android:background ="#ffc0c3c4" /> 

< EditText 
android:id ="@+id/password" 
android:layout_width ="fill_parent" 
android:layout_height ="44.0dip" 
android:background ="#00ffffff" 
android:gravity ="center_vertical" 
android:inputType ="textPassword" 
android:maxLength ="16" 
android:maxLines ="1" 
android:textColor ="#ff1d1d1d" 
android:textColorHint ="#ff666666" 
android:textSize ="16.0sp" /> 
</LinearLayout > 

<Button 
android:id ="@+id/buton1" 
android:layout_width ="270dp" 
android:background ="@drawable/chat_send_button_bg" 
android:paddingTop ="5.0dip" 
android:layout_height ="50dp" 
android:layout_marginLeft ="28.0dip" 
android:layout_marginRight ="28.0dip" 
android:layout_marginTop ="12.0dip" 
android:layout_below ="@+id/input" 
android:gravity ="center" 
android:textSize ="20dp" 
android:text = "登錄" /> 

<RelativeLayout 
android:id ="@+id/relative" 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:layout_alignLeft ="@+id/input" 
android:layout_alignRight ="@+id/input" 
android:layout_below ="@id/buton1" > 

< CheckBox 
android:id ="@+id/auto_save_password" 
android:layout_width ="wrap_content" 
android:layout_height ="wrap_content" 
android:layout_alignParentLeft ="true" 
android:background ="@null" 
android:button ="@null" 
android:checked ="true" 
android:drawableLeft ="@drawable/checkbox_bg1" 
android:drawablePadding ="4.0dip" 
android:text = "記住密碼" 
android:textColor ="#ffffffff" 
android:textSize ="12.0sp" /> 

< Button 
android:id ="@+id/regist" 
android:layout_width ="wrap_content" 
android:layout_height ="wrap_content" 
android:layout_alignParentRight ="true" 
android:background ="@drawable/login_reg_normal" 
android:clickable ="true" 
android:gravity ="left|center" 
android:paddingLeft ="8.0dip" 
android:paddingRight ="18.0dip" 
android:text = "注冊新賬號" 
android:textColor ="#ffffffff" 
android:textSize ="12.0sp" /> 
</RelativeLayout > 

<LinearLayout 
android:id ="@+id/more_bottom" 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:layout_alignParentBottom ="true" 
android:background ="@drawable/login_moremenu_back" 
android:orientation ="vertical" > 

<RelativeLayout 
android:id ="@+id/input2" 
android:layout_width ="fill_parent" 
android:layout_height ="40dp" 
android:background ="@drawable/login_moremenu_back" 
android:orientation ="vertical" > 

< ImageView 
android:id ="@+id/more_image" 
android:layout_width ="wrap_content" 
android:layout_height ="wrap_content" 
android:layout_centerVertical ="true" 
android:layout_marginRight ="5.0dip" 
android:layout_toLeftOf ="@+id/more_text" 
android:clickable ="false" 
android:src ="@drawable/login_more_up" /> 

< TextView 
android:id ="@+id/more_text" 
android:layout_width ="wrap_content" 
android:layout_height ="wrap_content" 
android:layout_centerInParent ="true" 
android:background ="@null" 
android:gravity ="center" 
android:maxLines ="1" 
android:text = "更多登陸選項" 
android:textColor ="#ffc6e6f9" 
android:textSize ="14.0sp" /> 
</RelativeLayout > 
<LinearLayout 
android:id ="@+id/morehidebottom" 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:orientation ="vertical" 
android:visibility ="gone" > 

< View 
android:layout_width ="fill_parent" 
android:layout_height ="1.0px" 
android:background ="#ff005484" /> 

< View 
android:layout_width ="fill_parent" 
android:layout_height ="1.0px" 
android:background ="#ff0883cb" /> 

< LinearLayout 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:layout_marginLeft ="30.0dip" 
android:layout_marginRight ="30.0dip" 
android:layout_marginTop ="12.0dip" 
android:orientation ="horizontal" > 

< CheckBox 
android:id ="@+id/hide_login" 
android:layout_width ="1.0px" 
android:layout_height ="wrap_content" 
android:layout_weight ="2.0" 
android:background ="@null" 
android:button ="@null" 
android:checked ="false" 
android:drawableLeft ="@drawable/checkbox_bg1" 
android:drawablePadding ="4.0dip" 
android:text = "隱身登陸" 
android:textColor ="#ffc6e6f9" 
android:textSize ="12.0sp" /> 

< CheckBox 
android:id ="@+id/silence_login" 
android:layout_width ="1.0px" 
android:layout_height ="wrap_content" 
android:layout_weight ="1.0" 
android:background ="@null" 
android:button ="@null" 
android:checked ="false" 
android:drawableLeft ="@drawable/checkbox_bg1" 
android:drawablePadding ="4.0dip" 
android:text = "靜音登錄" 
android:textColor ="#ffc6e6f9" 
android:textSize ="12.0sp" /> 
</ LinearLayout> 

< LinearLayout 
android:layout_width ="fill_parent" 
android:layout_height ="wrap_content" 
android:layout_marginBottom ="18.0dip" 
android:layout_marginLeft ="30.0dip" 
android:layout_marginRight ="30.0dip" 
android:layout_marginTop ="18.0dip" 
android:orientation ="horizontal" > 

< CheckBox 
android:id ="@+id/accept_accounts" 
android:layout_width ="1.0px" 
android:layout_height ="wrap_content" 
android:layout_weight ="2.0" 
android:background ="@null" 
android:button ="@null" 
android:checked ="true" 
android:drawableLeft ="@drawable/checkbox_bg1" 
android:drawablePadding ="4.0dip" 
android:singleLine ="true" 
android:text = "允許手機/電腦同時在心線" 
android:textColor ="#ffc6e6f9" 
android:textSize ="12.0sp" /> 

< CheckBox 
android:id ="@+id/accept_troopmsg" 
android:layout_width ="1.0px" 
android:layout_height ="wrap_content" 
android:layout_weight ="1.0" 
android:background ="@null" 
android:button ="@null" 
android:checked ="true" 
android:drawableLeft ="@drawable/checkbox_bg1" 
android:drawablePadding ="4.0dip" 
android:text = "接受群消息" 
android:textColor ="#ffc6e6f9" 
android:textSize ="12.0sp" /> 
</ LinearLayout> 
</ LinearLayout> 

</LinearLayout > 

</ RelativeLayout>

各個組件的使用沒有問題，關鍵是如何設置他們的屬性，來獲得一個比較美觀的效果，大家可以參考這個例子，來做一下練習，來強化UI的設計。從這個例子中就可以學到很多東西，比如ViwGroup的使用（如何槍套），background的設置，例如同時使用兩個Edittext,設置android:background ="@null"設置為空的時候就不會產生間隔了。這個要自己多做設計，時間長了就會有感悟了。最后看一下MainActivity的代碼，布局簡單

復制代碼代碼如下:

package com.example.imitateqq; 

import android.os.Bundle; 
import android.app.Activity; 
import android.app.Dialog; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.ImageView; 

public class QQ extends Activity implements OnClickListener{ 

private Button login_Button; 
private View moreHideBottomView,input2; 
private ImageView more_imageView; 
private boolean mShowBottom = false; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_qq); 
initView(); 
} 

private void initView() { 
login_Button=(Button) findViewById(R.id.buton1); 
login_Button.setOnClickListener(this); 

moreHideBottomView=findViewById(R.id.morehidebottom); 
more_imageView=(ImageView) findViewById(R.id.more_image); 

input2=findViewById(R.id.input2); 
input2.setOnClickListener( this); 
} 

public void showBottom(boolean bShow){ 
if(bShow){ 
moreHideBottomView.setVisibility(View.GONE); 
more_imageView.setImageResource(R.drawable.login_more_up); 
mShowBottom = true; 
}else{ 
moreHideBottomView.setVisibility(View.VISIBLE); 
more_imageView.setImageResource(R.drawable.login_more); 
mShowBottom = false; 
} 
} 

public void onClick(View v) { 
switch(v.getId()) 
{ 
case R.id.input2: 
showBottom(!mShowBottom); 
break; 
case R.id.buton1: 
showRequestDialog(); 
break; 
default: 
break; 
} 
} 

private Dialog mDialog = null; 
private void showRequestDialog() 
{ 
if (mDialog != null) 
{ 
mDialog.dismiss(); 
mDialog = null; 
} 
mDialog = DialogFactory.creatRequestDialog(this, "正在驗證賬號..."); 
mDialog.show(); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
getMenuInflater().inflate(R.menu.activity_qq, menu); 
return true; 
} 
}