Android 多媒体—相册

package com.photo; import java.io.File; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.ActivityInfo; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class PhotoAlbum extends Activity { /** Called when the activity is first created. */ private Spinner mSpinner; private ImageView mImageView1,mImageView2,mImageView3,mImageView4,mImageView5,mImageView6; private ImageButton mImageButton_help,mImageButton_close; private ImageButton mImageButton_pre,mImageButton_next; private ImageButton mImageButton_take_photo,mImageButton_synchro_photo; private TextView mTextView_photo_num; private int H,m,s; //定义时、分、秒 private Calendar c; private TextView mTextView_hour,mTextView_minute; private static final String PATH = "/sdcard/photo/"; private String[] photo_folder; private ArrayAdapter<String> adapter; private String folder_name; private List<List<String>> listParent = new ArrayList<List<String>>(); private List<String> listChild = new ArrayList<String>(); private ImageView[] imageViews; private int list_id = 0; private int size; //某一文件夹下所有图片的数量 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setScreen(); setContentView(R.layout.main); //初始化UI对象 findViews(); //事件监听 setOnListener(); //获取当前时间 getCurrentTime(); //定时器 handler.postDelayed(task, 1000); listPhotoFolder(PATH); } public void setScreen(){ //设置全屏窗口 requestWindowFeature(Window.FEATURE_NO_TITLE); //全屏 getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN , WindowManager.LayoutParams. FLAG_FULLSCREEN); //横屏显示 this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); } public void findViews(){ //显示系统时间 mTextView_hour = (TextView) findViewById(R.id.TextView_hour); mTextView_minute = (TextView) findViewById(R.id.TextView_minute); mSpinner = (Spinner) findViewById(R.id.Spinner); mImageView1 = (ImageView) findViewById(R.id.ImageView1); mImageView2 = (ImageView) findViewById(R.id.ImageView2); mImageView3 = (ImageView) findViewById(R.id.ImageView3); mImageView4 = (ImageView) findViewById(R.id.ImageView4); mImageView5 = (ImageView) findViewById(R.id.ImageView5); mImageView6 = (ImageView) findViewById(R.id.ImageView6); imageViews = new ImageView[]{mImageView1,mImageView2,mImageView3,mImageView4,mImageView5,mImageView6}; mImageButton_help = (ImageButton) findViewById(R.id.ImageButton_help); mImageButton_close = (ImageButton) findViewById(R.id.ImageButton_close); mImageButton_pre = (ImageButton) findViewById(R.id.ImageButton_pre); mImageButton_next = (ImageButton) findViewById(R.id.ImageButton_next); mImageButton_take_photo = (ImageButton) findViewById(R.id.ImageButton_take_photo); mImageButton_synchro_photo = (ImageButton) findViewById(R.id.ImageButton_synchro_photo); mImageButton_pre.setVisibility(View.INVISIBLE); mImageButton_next.setVisibility(View.INVISIBLE); for(int i = 0;i < 6;i ++){ imageViews[i].setVisibility(View.GONE); imageViews[i].setEnabled(false); } mImageButton_help.setBackgroundDrawable(getResources().getDrawable(R.drawable.help)); mImageButton_close.setBackgroundDrawable(getResources().getDrawable(R.drawable.close)); mImageButton_pre.setBackgroundDrawable(getResources().getDrawable(R.drawable.pre_nor)); mImageButton_next.setBackgroundDrawable(getResources().getDrawable(R.drawable.next_nor)); mImageButton_take_photo.setBackgroundDrawable(getResources().getDrawable(R.drawable.take_photo_normal)); mImageButton_synchro_photo.setBackgroundDrawable(getResources().getDrawable(R.drawable.synchro_photo_normal)); mTextView_photo_num = (TextView) findViewById(R.id.TextView_photo_num); } //获取当前时间 public void getCurrentTime(){ c = Calendar.getInstance(); H = c.get(Calendar.HOUR_OF_DAY); m = c.get(Calendar.MINUTE); s = c.get(Calendar.SECOND); mTextView_hour.setText(format(H)); mTextView_minute.setText(format(m)); } //用定时器来显示时间 private Handler handler = new Handler(); private Runnable task = new Runnable(){ public void run() { handler.postDelayed(task, 1000); if(s < 60){ s ++; }else if(m < 60){ s = 0; m++; }else if(H < 24){ m = 0; H++; }else{ H = 0; } mTextView_hour.setText(format(H)); mTextView_minute.setText(format(m)); } }; //事件监听 public void setOnListener(){ mSpinner.setOnItemSelectedListener(spinner); mImageButton_help.setOnClickListener(btn_help); mImageButton_close.setOnClickListener(btn_close); mImageButton_pre.setOnClickListener(btn_pre); mImageButton_next.setOnClickListener(btn_next); for(int i = 0;i < 6;i ++){ final int n = i; imageViews[n].setOnClickListener(new ImageView.OnClickListener(){ public void onClick(View v) { mMakeText(list_id + "--" + n,true); Intent intent = new Intent(); intent.setClass(PhotoAlbum.this,ShowPhoto.class); Bundle bundle = new Bundle(); bundle.putInt("list_id", list_id); bundle.putInt("photo_id", n); bundle.putString("folder_name", folder_name); intent.putExtras(bundle); startActivity(intent); } }); } } //帮助按钮 ImageButton.OnClickListener btn_help = new ImageButton.OnClickListener(){ public void onClick(View v) { Toast.makeText(PhotoAlbum.this, "此功能还没完善，谢谢使用！", Toast.LENGTH_SHORT).show(); } }; //关闭按钮 ImageButton.OnClickListener btn_close = new ImageButton.OnClickListener(){ public void onClick(View v) { Dialog dialog = new AlertDialog.Builder(PhotoAlbum.this) .setTitle("退出提示！") .setMessage("您确定要退出吗？") .setPositiveButton("确定",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { PhotoAlbum.this.finish(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { } }).create(); dialog.show(); } }; //下拉列表事件，选择文件夹，显示该文件夹下的所有图片，默认显示第一个文件夹的相片 Spinner.OnItemSelectedListener spinner = new Spinner.OnItemSelectedListener(){ public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { folder_name = photo_folder[arg2]; list_id = 0; listParent.clear(); //重新选择时将父列表和子列表都清空 listChild.clear(); mImageButton_pre.setVisibility(View.VISIBLE); mImageButton_next.setVisibility(View.VISIBLE); listPhoto(folder_name); } public void onNothingSelected(AdapterView<?> arg0) { } }; //上一个图片 ImageButton.OnClickListener btn_pre = new ImageButton.OnClickListener(){ public void onClick(View v) { list_id --; showPhotos(folder_name,listParent.get(list_id)); judge(); } }; //下一个图片 ImageButton.OnClickListener btn_next = new ImageButton.OnClickListener(){ public void onClick(View v) { list_id ++; showPhotos(folder_name,listParent.get(list_id)); judge(); } }; //遍历photo文件夹下的所有文件夹 public v