PopWindow实现的文件浏览器，可对文件进行删除操作

package popup.activity; import java.io.File; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.os.Environment; import android.util.DisplayMetrics; import android.util.Log; import android.view.ContextMenu; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnLongClickListener; import android.view.ViewGroup; import android.view.ContextMenu.ContextMenuInfo; import android.view.View.OnClickListener; import android.view.View.OnCreateContextMenuListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.TextView; import android.widget.Toast; /** * 此类用于浏览sd卡里面的文件并对文件进行删除操作 * @author dell * */ public class MainActivity extends Activity { /** Called when the activity is first created. */ Button myButton,submit,cancel; ImageButton back; PopupWindow window; TextView pathText; ListView fileList; String rootPath; File file; File[] files; File fileWhich=null; private DisplayMetrics dm; private float Swidth,Sheight,density; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myButton=(Button)findViewById(R.id.myButton); myButton.setOnClickListener(new ButtonListener()); rootPath=Environment.getExternalStorageDirectory()+""; System.out.println("rootPath-->"+rootPath); dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); density = dm.density; Swidth = dm.widthPixels*density*0.9f; Sheight = dm.heightPixels*density*0.9f; System.out.println("width-->"+Swidth+"--height--->"+Sheight+"---density--->"+density); // View v = LayoutInflater.from(this).inflate(R.layout.main, null); // popWindow(findViewById(R.layout.main)); // onItemLongClick(); } // private void popWindow(View parent) { if (window == null) { LayoutInflater lay = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = lay.inflate(R.layout.popup_window, null); v.setBackgroundDrawable(getResources().getDrawable(R.drawable.pop_round_corner)); pathText=(TextView)v.findViewById(R.id.tip); pathText.setText(rootPath); fileList=(ListView)v.findViewById(R.id.lv); fileList.setOnItemClickListener(new fileAdapterListener()); submit=(Button)v.findViewById(R.id.submit); submit.setOnClickListener(new confirmListener()); cancel=(Button)v.findViewById(R.id.cancel); cancel.setOnClickListener(new cancelListener()); back=(ImageButton)v.findViewById(R.id.backButton); back.setOnClickListener(new backListener()); file=new File(rootPath); files=file.listFiles(); System.out.println("item-->"); if(files != null){ fileList.setAdapter(new ScanFileAdapter(files, MainActivity.this)); fileList.setOnCreateContextMenuListener(new OnCreateContextMenuListener() { public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { // TODO Auto-generated method stub menu.add(0, 0, 0, "打开"); menu.add(0, 1, 0, "删除"); menu.add(0, 2, 0, "删除所有"); } }); } // window = new PopupWindow(v, (int)Swidth,(int)Sheight); } //设置整个popupwindow的样式。 window.setBackgroundDrawable(getResources().getDrawable(R.drawable.pop_round_corner)); //使窗口里面的空间显示其相应的效果，比较点击button时背景颜色改变。 //如果为false点击相关的空间表面上没有反应，但事件是可以监听到的。 //listview的话就没有了作用。 window.setFocusable(true);//如果不设置setFocusable为true，popupwindow里面是获取不到焦点的，那么如果popupwindow里面有输入框等的话就无法输入。 window.update(); window.showAtLocation(parent, Gravity.CENTER_VERTICAL, 0, 0); // window.showAsDropDown(parent); // onItemLongClick(); ItemOnLongClick2(); } // class ButtonListener implements OnClickListener{ @Override public void onClick(View v) { // TODO Auto-generated method stub if(window != null){ if(window.isShowing()){ window.dismiss(); // window=null; } else { window.showAtLocation(v, Gravity.CENTER_VERTICAL, 0, 0);; } } else{ popWindow(v); } } } // class fileAdapterListener implements OnItemClickListener{ @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub File file3=new File(pathText.getText().toString()); File[] files3=file3.listFiles(); if(files3[arg2].isDirectory()){ File file1=new File(files3[arg2].getAbsolutePath()); File[] files1=file1.listFiles(); // System.out.println("item-->"+files1.length); if(files1 != null){ fileList.setAdapter(new ScanFileAdapter(files1, MainActivity.this)); String s=files3[arg2].getAbsolutePath();//pathText.getText().toString()+files[arg2].getName()+"/"; pathText.setText(s); } } else{ fileWhich=files3[arg2]; } } } //ListView长按响应函数 private void onItemLongClick(){ if(fileList != null) fileList.setOnCreateContextMenuListener(new OnCreateContextMenuListener() { public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { // TODO Auto-generated method stub menu.add(0, 0, 0, "打开"); menu.add(0, 1, 0, "删除"); menu.add(0, 2, 0, "删除所有"); } }); else Log.i("meg--------->", fileList.toString()); } public boolean onContextItemSelected(MenuItem item) { // TODO Auto-generated method stub AdapterView.AdapterContextMenuInfo info=(AdapterView.AdapterContextMenuInfo)item.getMenuInfo(); final int id=(int)info.id; // System.out.println("infoID-->"+info.id); switch(item.getItemId()){ case 0: // File file3=new File(pathText.getText().toString()); // File[] files3=file3.listFiles(); // if(files3[id].isDirectory()){ // File file1=new File(files3[id].getAbsolutePath()); // File[] files1=file1.listFiles(); // System.out.println("item-->"+files1.length); // fileList.setAdapter(new ScanFileAdapter(files1, MainActivity.this)); // String s=files3[id].getAbsolutePath();//pathText.getText().toString()+files[arg2].getName()+"/"; // pathText.setText(s); // } // else{ // fileWhich=files3[id]; // } break; case 1: File file = (File)fileList.getAdapter().getItem(id); System.out.println("filename-->"+file.getAbsolutePath()); break; case 2: break; } return super.onContextItemSelected(item); } // private void ItemOnLongClick2() { fileList.setOnItemLongClickListener(new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> arg0, View arg1,final int arg2, long arg3) { final String s[]={"打开","删除","全部删除"}; new AlertDialog.Builder(MainActivity.this) .setTitle("请选择") .setItems(s,//R.array.arrcontent, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog,int which) { // String[] PK = getResources().getStringArray(R.array.arrcontent); Toast.makeText(MainActivity.this,s[which],Toast.LENGTH_LONG).show(); if (s[which].equals("删除"))