快速搜索手机上某文件

public class SearchFileActivity extends Activity{
List<String> list=new ArrayList<>();
private ArrayAdapter<String> adapter;
private List<String> pathlist=new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.searchfile);
EditText search_edit=findViewById(R.id.search_edit);
ListView search_list=findViewById(R.id.search_list);
adapter = new ArrayAdapter(this, android.R.layout.simple_expandable_list_item_1, list);
search_list.setAdapter(adapter);
search_edit.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

}

@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
list.clear();

//默认为sd卡，但是此时搜索较为卡顿，建议制定到某文件夹内部
searchFile(charSequence.toString().trim(), "/sdcard/");
adapter.notifyDataSetChanged();
}

@Override
public void afterTextChanged(Editable editable) {

}
});
search_list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
String s = list.get(i);
//s为选定的文件夹路径

}
});

}
private void searchFile(String filename, String path) {
File[] files = null;
try {
files = new File(path).listFiles();
} catch (Exception e) {
files = null;
Toast.makeText(this, "搜索", Toast.LENGTH_SHORT).show();
return;
}

for (File file : files) {
if (file.isDirectory() && file.listFiles() != null) {
searchFile(filename, file.getPath());
} else if (file.isFile()) {
if (filename == null || filename.isEmpty()) {
list.add(file.getPath());
} else {
String name = file.getName();
if (name.indexOf(filename) != -1) {
list.add(file.getPath());
}
}
}
}
}
}

布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"android:padding="30dp"><EditTextandroid:id="@+id/search_edit"android:layout_width="match_parent"android:layout_height="wrap_content" /><ListViewandroid:id="@+id/search_list"android:layout_width="match_parent"android:layout_height="match_parent"></ListView></LinearLayout>