主Activity:
public class MainActivity extends ListActivity {
private static final String ROOT_PATH = "/";
//存储文件名称
private ArrayList<String> names = null;
//存储文件路径
private ArrayList<String> paths = null;
private View view;
private EditText editText;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//显示文件列表
showFileDir(ROOT_PATH);
}
private void showFileDir(String path){
names = new ArrayList<String>();
paths = new ArrayList<String>();
File file = new File(path);
File[] files = file.listFiles();
//如果当前目录不是根目录
if (!ROOT_PATH.equals(path)){
names.add("@1");
paths.add(ROOT_PATH);
names.add("@2");
paths.add(file.getParent());
}
//添加所有文件
for (File f : files){
names.add(f.getName());
paths.add(f.getPath());
}
this.setListAdapter(new MyAdapter(this,names, paths));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
String path = paths.get(position);
File file = new File(path);
// 文件存在并可读
if (file.exists() && file.canRead()){
if (file.isDirectory()){
//显示子目录及文件
showFileDir(path);
}
else{
//处理文件
fileHandle(file);
}
}
//没有权限
else{
Resources res = getResources();
new AlertDialog.Builder(this).setTitle("Message")
.setMessage(res.getString(R.string.no_permission))
.setPositiveButton("OK",new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
super.onListItemClick(l, v, position, id);
}
//对文件进行增删改
private void fileHandle(final File file){
OnClickListener listener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// 打开文件
if (which == 0){
openFile(file);
}
//修改文件名
else if(which == 1){
LayoutInflater factory = LayoutInflater.from(MainActivity.this);
view = factory.inflate(R.layout.rename_dialog, null);
editText = (EditText)view.findViewById(R.id.editText);
editText.setText(file.getName());
OnClickListener listener2 = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
String modifyName = editText.getText().toString();
final String fpath = file.getParentFile().getPath();
final File newFile = new File(fpath + "/" + modifyName);
if (newFile.exists()){
//排除没有修改情况
if (!modifyName.equals(file.getName())){
new AlertDialog.Builder(MainActivity.this)
.setTitle("注意!")
.setMessage("文件名已存在，是否覆盖？")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (file.renameTo(newFile)){
showFileDir(fpath);
displayToast("重命名成功！");
}
else{
displayToast("重命名失败！");
}
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
}
}
else{
if (file.renameTo(newFile)){
showFileDir(fpath);
displayToast("重命名成功！");
}
else{
displayToast("重命名失败！");
}
}
}
};
AlertDialog renameDialog = new AlertDialog.Builder(MainActivity.this).create();
renameDialog.setView(view);
renameDialog.setButton("确定", listener2);
renameDialog.setButton2("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
renameDialog.show();
}
//删除文件
else{
new AlertDialog.Builder(MainActivity.this)
.setTitle("注意!")
.setMessage("确定要删除此文件吗？")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(file.delete()){
//更新文件列表
showFileDir(file.getParent());
displayToast("删除成功！");
}
else{
displayToast("删除失败！");
}
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
}
};
//选择文件时，弹出增删该操作选项对话框
String[] menu = {"打开文件","重命名","删除文件"};
new AlertDialog.Builder(MainActivity.this)
.setTitle("请选择要进行的操作!")
.setItems(menu, listener)
.setPositiveButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
//打开文件
private void openFile(File file){
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
String type = getMIMEType(file);
intent.setDataAndType(Uri.fromFile(file), type);
startActivity(intent);
}
//获取文件mimetype
private String getMIMEType(File file){
String type = "";
String name = file.getName();
//文件扩展名
String end = name.substring(name.lastIndexOf(".") + 1, name.length()).toLowerCase();
if (end.equals("m4a") || end.equals("mp3") || end.equals("wav")){
type = "audio";
}
else if(end.equals("mp4") || end.equals("3gp")) {
type = "video";
}
else if (end.equals("jpg") || end.equals("png") || end.equals("jpeg") || end.equals("bmp") || end.equals("gif")){
type = "image";
}
else {
//如果无法直接打开，跳出列表由用户选择
type = "*";
}
type += "/*";
return type;
}
private void displayToast(String message){
Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
}
}
