2019獨角獸企業重金招聘Python工程師標準>>>

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?? ?來說說它的思路，底下是兩個或多個視圖，分別通過控制它們的寬度、左邊距來控制它們的顯示，來看看代碼?

activity_main.xml

<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"???? 02????????xmlns:tools="http://schemas.android.com/tools"???? 03????????android:id="@+id/layout"???? 04????????android:layout_width="match_parent"???? 05????????android:layout_height="match_parent"???? 06????????android:orientation="horizontal"???? 07????????tools:context=".MainActivity"?>???? 08???? 09????????<LinearLayout???? 10????????????android:id="@+id/menu"???? 11????????????android:layout_width="match_parent"???? 12????????????android:layout_height="match_parent"???? 13????????????android:background="@drawable/menu"?>???? 14????????</LinearLayout>???? 15???? 16????????<LinearLayout???? 17????????????android:id="@+id/content"???? 18????????????android:layout_width="match_parent"???? 19????????????android:layout_height="match_parent"???? 20????????????android:background="@drawable/content"?>???? 21????????</LinearLayout>???? 22???? 23????</LinearLayout>

?MainActivity.java

public?class?MainActivity?extends?Activity?implements?OnTouchListener???? 02????{???? 03???? 04????????private?LinearLayout?menu;???? 05????????private?LinearLayout?content;???? 06????????private?LayoutParams?menuParams;???? 07????????private?LayoutParams?contentParams;???? 08???? 09????????//?menu完全顯示時，留給content的寬度值。???? 10????????private?static?final?int?menuPadding?=?80;???? 11???? 12????????//?分辨率???? 13????????private?int?disPlayWidth;???? 14???? 15????????private?float?xDown;???? 16????????private?float?xMove;???? 17???? 18????????private?boolean?mIsShow?=?false;???? 19????????private?static?final?int?speed?=?50;???? 20???? 21????????@Override???? 22????????protected?void?onCreate(Bundle?savedInstanceState)???? 23????????{???? 24????????????super.onCreate(savedInstanceState);???? 25????????????requestWindowFeature(Window.FEATURE_NO_TITLE);???? 26????????????setContentView(R.layout.activity_main);???? 27???? 28????????????disPlayWidth?=?getWindowManager().getDefaultDisplay().getWidth();???? 29???? 30????????????menu?=?(LinearLayout)?findViewById(R.id.menu);???? 31????????????content?=?(LinearLayout)?findViewById(R.id.content);???? 32????????????menuParams?=?(LayoutParams)?menu.getLayoutParams();???? 33????????????contentParams?=?(LayoutParams)?content.getLayoutParams();???? 34????????????findViewById(R.id.layout).setOnTouchListener(this);???? 35???? 36????????????menuParams.width?=?disPlayWidth?-?menuPadding;???? 37????????????contentParams.width?=?disPlayWidth;???? 38????????????showMenu(mIsShow);???? 39????????}???? 40???? 41????????@Override???? 42????????public?boolean?onTouch(View?v,?MotionEvent?event)???? 43????????{???? 44????????????switch?(event.getAction())???? 45????????????{???? 46????????????case?MotionEvent.ACTION_DOWN:???? 47????????????????showMenu(!mIsShow);???? 48????????????????break;???? 49????????????case?MotionEvent.ACTION_MOVE:???? 50????????????????break;???? 51????????????case?MotionEvent.ACTION_UP:???? 52????????????????break;???? 53????????????}???? 54????????????return?true;???? 55????????}???? 56???? 57????????private?void?showMenu(boolean?isShow)???? 58????????{???? 59????????????if?(isShow)???? 60????????????{???? 61????????????????mIsShow?=?true;???? 62????????????????menuParams.leftMargin?=?0;???? 63????????????}?else???? 64????????????{???? 65????????????????mIsShow?=?false;???? 66????????????????menuParams.leftMargin?=?0?-?menuParams.width;???? 67????????????}???? 68????????????menu.setLayoutParams(menuParams);???? 69????????}???? 70????????}

上述代碼只是用兩張圖片代替了兩個復雜的view(layout)，你會發現，兩個視圖雖然可以切換，但沒有動畫的感覺，再加上要有拖動效果，所以，我們再給它加個平移時間段，看起來有動畫的效果

package?com.example.test;???? 002???? 003????import?android.app.Activity;???? 004????import?android.os.AsyncTask;???? 005????import?android.os.Bundle;???? 006????import?android.util.Log;???? 007????import?android.view.MotionEvent;???? 008????import?android.view.View;???? 009????import?android.view.View.OnClickListener;???? 010????import?android.view.View.OnTouchListener;???? 011????import?android.view.Window;???? 012????import?android.widget.LinearLayout;???? 013????import?android.widget.LinearLayout.LayoutParams;???? 014???? 015????public?class?MainActivity?extends?Activity?implements?OnTouchListener,?OnClickListener???? 016????{???? 017???? 018????????private?LinearLayout?menu;???? 019????????private?LinearLayout?content;???? 020????????private?LayoutParams?menuParams;???? 021????????private?LayoutParams?contentParams;???? 022???? 023????????//?menu完全顯示時，留給content的寬度值。???? 024????????private?static?final?int?menuPadding?=?80;???? 025???? 026????????//?分辨率???? 027????????private?int?disPlayWidth;???? 028???? 029????????private?float?xDown;???? 030????????private?float?xMove;???? 031???? 032????????private?boolean?mIsShow?=?false;???? 033????????private?static?final?int?speed?=?50;???? 034???? 035????????@Override???? 036????????protected?void?onCreate(Bundle?savedInstanceState)???? 037????????{???? 038????????????super.onCreate(savedInstanceState);???? 039????????????requestWindowFeature(Window.FEATURE_NO_TITLE);???? 040????????????setContentView(R.layout.activity_main);???? 041???? 042????????????disPlayWidth?=?getWindowManager().getDefaultDisplay().getWidth();???? 043???? 044????????????menu?=?(LinearLayout)?findViewById(R.id.menu);???? 045????????????menu.setOnClickListener(this);???? 046????????????content?=?(LinearLayout)?findViewById(R.id.content);???? 047????????????content.setOnClickListener(this);???? 048????????????menuParams?=?(LayoutParams)?menu.getLayoutParams();???? 049????????????contentParams?=?(LayoutParams)?content.getLayoutParams();???? 050????????????//findViewById(R.id.layout).setOnTouchListener(this);???? 051???? 052????????????menuParams.width?=?disPlayWidth?-?menuPadding;???? 053????????????contentParams.width?=?disPlayWidth;???? 054????????????showMenu(mIsShow);???? 055????????}???? 056???? 057????????@Override???? 058????????public?void?onClick(View?v)???? 059????????{???? 060????????????switch?(v.getId())???? 061????????????{???? 062????????????case?R.id.menu:???? 063????????????????new?showMenuAsyncTask().execute(-50);???? 064????????????????break;???? 065????????????case?R.id.content:???? 066????????????????new?showMenuAsyncTask().execute(50);???? 067????????????????break;???? 068????????????}???? 069???? 070????????}???? 071???? 072????????@Override???? 073????????public?boolean?onTouch(View?v,?MotionEvent?event)???? 074????????{???? 075????????????switch?(event.getAction())???? 076????????????{???? 077????????????case?MotionEvent.ACTION_DOWN:???? 078????????????????showMenu(!mIsShow);???? 079????????????????break;???? 080????????????case?MotionEvent.ACTION_MOVE:???? 081????????????????break;???? 082????????????case?MotionEvent.ACTION_UP:???? 083????????????????break;???? 084????????????}???? 085????????????return?true;???? 086????????}???? 087???? 088????????private?void?showMenu(boolean?isShow)???? 089????????{???? 090????????????if?(isShow)???? 091????????????{???? 092????????????????mIsShow?=?true;???? 093????????????????menuParams.leftMargin?=?0;???? 094????????????}?else???? 095????????????{???? 096????????????????mIsShow?=?false;???? 097????????????????menuParams.leftMargin?=?0?-?menuParams.width;???? 098????????????}???? 099????????????menu.setLayoutParams(menuParams);???? 100????????}???? 101???? 102????????/**???? 103????????*???? 104????????*這是主要代碼：模擬動畫過程，也讓我更熟悉了AsyncTask這玩意兒???? 105????????*???? 106????????*/???? 107????????class?showMenuAsyncTask?extends?AsyncTask<Integer,?Integer,?Integer>???? 108????????{???? 109???? 110????????????@Override???? 111????????????protected?Integer?doInBackground(Integer...?params)???? 112????????????{???? 113????????????????int?leftMargin?=?menuParams.leftMargin;???? 114???? 115????????????????//這里也是值得學習的地方，如果在平常，自己肯定又是這樣寫:???? 116????????????????//???if(){???? 117????????????????//???????while()???? 118????????????????//??}???? 119????????????????//???else?if(){???? 120????????????????//???????while()???? 121????????????????//??}???? 122????????????????while?(true)???? 123????????????????{???? 124????????????????????leftMargin?+=?params[0];???? 125????????????????????if?(params[0]?>?0?&&?leftMargin?>=?0)???? 126????????????????????{???? 127????????????????????????break;???? 128????????????????????}?else?if?(params[0]?<?0?&&?leftMargin?<=?-menuParams.width)???? 129????????????????????{???? 130????????????????????????break;???? 131????????????????????}???? 132????????????????????publishProgress(leftMargin);???? 133????????????????????try???? 134????????????????????{???? 135????????????????????????Thread.sleep(30);???? 136????????????????????}?catch?(InterruptedException?e)???? 137????????????????????{???? 138????????????????????????e.printStackTrace();???? 139????????????????????}???? 140????????????????}???? 141????????????????return?leftMargin;???? 142????????????}???? 143???? 144????????????@Override???? 145????????????protected?void?onProgressUpdate(Integer...?values)???? 146????????????{???? 147????????????????super.onProgressUpdate(values);???? 148????????????????menuParams.leftMargin?=?values[0];???? 149????????????????menu.setLayoutParams(menuParams);???? 150????????????}???? 151???? 152????????????@Override???? 153????????????protected?void?onPostExecute(Integer?result)???? 154????????????{???? 155????????????????super.onPostExecute(result);???? 156????????????????menuParams.leftMargin?=?result;???? 157????????????????menu.setLayoutParams(menuParams);???? 158????????????}???? 159???? 160????????}???? 161???? 162????}

轉載于:https://my.oschina.net/u/1036767/blog/213976

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