Android 扫描文件，可以指定扫描文件的类型

android 白天黑夜模式切换例子源码

通过GSM信息最强的基站及其信息强度来计算定位，其它制式的则使用WIFI热点及其信息强度来计算定位，能通过自动开启WIFI功能来定位。

你可以把视频作为安卓的实况墙纸。视频应该被输出到帧。

调用系统相册和系统照相机功能de实例源码

A slide-out navigation (a.k.a. "Drawer") implementation for Android applications. The slide-out navigation pattern has been popping up in all sorts of places in the Android ecosystem lately in all sorts of shapes and sizes. Undergarment initially started with me mimicking the experience found in the Prixing application, as documented by Cyril Mottier in his series of three blog  请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

安卓调用系统闹钟及获取所有软件信息例子 源码

package com.codeshogun.android.swipesample;import android.app.Activity;import android.os.Bundle;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.View;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.ViewFlipper;public class Main extends Activity { private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_MAX_OFF_PATH = 250; private static final int SWIPE_THRESHOLD_VELOCITY = 200; private GestureDetector gestureDetector; View.OnTouchListener gestureListener; private Animation slideLeftIn; private Animation slideLeftOut; private Animation slideRightIn; private Animation slideRightOut; private ViewFlipper viewFlipper; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); viewFlipper = (ViewFlipper)findViewById(R.id.flipper); slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in); slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_left_out); slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in); slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_right_out); gestureDetector = new GestureDetector(new MyGestureDetector()); gestureListener = new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if (gestureDetector.onTouchEvent(event)) { return true; } return false; } }; } class MyGestureDetector extends SimpleOnGestureListener { @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { try { if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) return false; // right to left swipe if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { viewFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFlipper.showNext(); } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(slideRightOut); viewFlipper.showPrevious(); } } catch (Exception e) { // nothing } return false; } } @Override public boolean onTouchEvent(MotionEvent event) { if (gestureDetector.onTouchEvent(event)) return true; else return false; }}

[实例简介] 仿微信浏览相册图片， 相册浏览 [实例截图] [核心代码]import java.io.File;import java.io.FilenameFilter;import java.util.ArrayList;import java.util.Arrays;import java.util.HashSet;import java.util.List;import android.app.Activity;import android.app.ProgressDialog;import android.content.ContentResolver;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.provider.MediaStore;import android.util.DisplayMetrics;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup.LayoutParams;import android.view.WindowManager;import android.widget.GridView;import android.widget.PopupWindow.OnDismissListener;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;import com.zhy.bean.ImageFloder;import com.zhy.imageloader.ListImageDirPopupWindow.OnImageDirSelected;public class MainActivity extends Activity implements OnImageDirSelected{ private ProgressDialog mProgressDialog; /** * 存储文件夹中的图片数量 */ private int mPicsSize; /** * 图片数量最多的文件夹 */ private File mImgDir; /** * 所有的图片 */ private List mImgs; private GridView mGirdView; private MyAdapter mAdapter; /** * 临时的辅助类，用于防止同一个文件夹的多次扫描 */ private HashSet mDirPaths = new HashSet(); /** * 扫描拿到所有的图片文件夹 */ private List mImageFloders = new ArrayList(); private RelativeLayout mBottomLy; private TextView mChooseDir; private TextView mImageCount; int totalCount = 0; private int mScreenHeight; private ListImageDirPopupWindow mListImageDirPopupWindow; private Handler mHandler = new Handler() { public void handleMessage(android.os.Message msg) { mProgressDialog.dismiss(); // 为View绑定数据 data2View(); // 初始化展示文件夹的popupWindw initListDirPopupWindw(); } }; /** * 为View绑定数据 */ private void data2View() { if (mImgDir == null) { Toast.makeText(getApplicationContext(), "擦，一张图片没扫描到", Toast.LENGTH_SHORT).show(); return; } mImgs = Arrays.asList(mImgDir.list()); /** * 可以看到文件夹的路径和图片的路径分开保存，极大的减少了内存的消耗； */ mAdapter = new MyAdapter(getApplicationContext(), mImgs, R.layout.grid_item, mImgDir.getAbsolutePath()); mGirdView.setAdapter(mAdapter); mImageCount.setText(totalCount "张"); }; /** * 初始化展示文件夹的popupWindw */ private void initListDirPopupWindw() { mListImageDirPopupWindow = new ListImageDirPopupWindow( LayoutParams.MATCH_PARENT, (int) (mScreenHeight * 0.7), mImageFloders, LayoutInflater.from(getApplicationContext()) .inflate(R.layout.list_dir, null)); mListImageDirPopupWindow.setOnDismissListener(new OnDismissListener() { @Override public void onDismiss() { // 设置背景颜色变暗 WindowManager.LayoutParams lp = getWindow().getAttributes(); lp.alpha = 1.0f; getWindow().setAttributes(lp); } }); // 设置选择文件夹的回调 mListImageDirPopupWindow.setOnImageDirSelected(this); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); DisplayMetrics outMetrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(outMetrics); mScreenHeight = outMetrics.heightPixels; initView(); getImages(); initEvent(); } /** * 利用ContentProvider扫描手机中的图片，此方法在运行在子线程中 完成图片的扫描，最终获得jpg最多的那个文件夹 */ private void getImages() { if (!Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { Toast.makeText(this, "暂无外部存储", Toast.LENGTH_SHORT).show(); return; } // 显示进度条 mProgressDialog = ProgressDialog.show(this, null, "正在加载..."); new Thread(new Runnable() { @Override public void run() { String firstImage = null; Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; ContentResolver mContentResolver = MainActivity.this .getContentResolver(); // 只查询jpeg和png的图片 Cursor mCursor = mContentResolver.query(mImageUri, null, MediaStore.Images.Media.MIME_TYPE "=? or " MediaStore.Images.Media.MIME_TYPE "=?", new String[] { "image/jpeg", "image/png" }, MediaStore.Images.Media.DATE_MODIFIED); Log.e("TAG", mCursor.getCount() ""); while (mCursor.moveToNext()) { // 获取图片的路径 String path = mCursor.getString(mCursor .getColumnIndex(MediaStore.Images.Media.DATA)); Log.e("TAG", path); // 拿到第一张图片的路径 if (firstImage == null) firstImage = path; // 获取该图片的父路径名 File parentFile = new File(path).getParentFile(); if (parentFile == null) continue; String dirPath = parentFile.getAbsolutePath(); ImageFloder imageFloder = null; // 利用一个HashSet防止多次扫描同一个文件夹（不加这个判断，图片多起来还是相当恐怖的~~） if (mDirPaths.contains(dirPath)) { continue; } else { mDirPaths.add(dirPath); // 初始化imageFloder imageFloder = new ImageFloder(); imageFloder.setDir(dirPath); imageFloder.setFirstImagePath(path); } int picSize = parentFile.list(new FilenameFilter() { @Override public boolean accept(File dir, String filename) { if (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".jpeg")) return true; return false; } }).length; totalCount = picSize; imageFloder.setCount(picSize); mImageFloders.add(imageFloder); if (picSize > mPicsSize) { mPicsSize = picSize; mImgDir = parentFile; } } mCursor.close(); // 扫描完成，辅助的HashSet也就可以释放内存了 mDirPaths = null; // 通知Handler扫描图片完成 mHandler.sendEmptyMessage(0x110); } }).start(); } /** * 初始化View */ private void initView() { mGirdView = (GridView) findViewById(R.id.id_gridView); mChooseDir = (TextView) findViewById(R.id.id_choose_dir); mImageCount = (TextView) findViewById(R.id.id_total_count); mBottomLy = (RelativeLayout) findViewById(R.id.id_bottom_ly); } private void initEvent() { /** * 为底部的布局设置点击事件，弹出popupWindow */ mBottomLy.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mListImageDirPopupWindow .setAnimationStyle(R.style.anim_popup_dir); mListImageDirPopupWindow.showAsDropDown(mBottomLy, 0, 0); // 设置背景颜色变暗 WindowManager.LayoutParams lp = getWindow().getAttributes(); lp.alpha = .3f; getWindow().setAttributes(lp); } }); } @Override public void selected(ImageFloder floder) { mImgDir = new File(floder.getDir()); mImgs = Arrays.asList(mImgDir.list(new FilenameFilter() { @Override public boolean accept(File dir, String filename) { if (filename.endsWith(".jpg") || filename.endsWith(".png") || filename.endsWith(".jpeg")) return true; return false; } })); /** * 可以看到文件夹的路径和图片的路径分开保存，极大的减少了内存的消耗； */ mAdapter = new MyAdapter(getApplicationContext(), mImgs, R.layout.grid_item, mImgDir.getAbsolutePath()); mGirdView.setAdapter(mAdapter); // mAdapter.notifyDataSetChanged(); mImageCount.setText(floder.getCount() "张"); mChooseDir.setText(floder.getName()); mListImageDirPopupWindow.dismiss(); }}

高仿陌陌初步版本android源码，完整实现陌陌的界面，基本框架，非常适合做社交软件开发基础

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