本文实例为大家分享了android遍历所有文件夹和子目录来搜索文件,供大家参考,具体内容如下
java代码:
import java.io.File; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class ShuosouwenjianActivity extends Activity implements OnClickListener { private File file; private String path; private String info; private String key; //关键字 private TextView result; // 显示结果 private EditText et; // 编辑view private Button search_btn; // button view @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); result = (TextView)findViewById(R.id.TextView_Result); et = (EditText)findViewById(R.id.key); search_btn = (Button)findViewById(R.id.button_search); // file = new File(Environment.getExternalStorageDirectory().getPath()); file = new File(\"/sdcard/\"); info = getString(R.string.info); search_btn.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub path = \"\"; result.setText(\"\"); key = et.getText().toString(); BrowserFile(file); } public void BrowserFile(File fileold) { if (key.equals(\"\")) { Toast.makeText(this, getString(R.string.pleaseInput), Toast.LENGTH_LONG).show(); } else { search(fileold); if (result.getText().equals(\"\")) { Toast.makeText(this, getString(R.string.notFound), Toast.LENGTH_SHORT).show(); } } } private void search(File fileold) { try{ File[] files=fileold.listFiles(); if(files.length>0) { for(int j=0;j<files.length;j++) { if(!files[j].isDirectory()) { if(files[j].getName().indexOf(key)> -1) { path += \"\\n\" + files[j].getPath(); result.setText(info+path); //shuju.putString(files[j].getName().toString(),files[j].getPath().toString()); } } else{ this.search(files[j]); } } } } catch(Exception e) { } } }
MAIN.XML代码:
<?xml version=\"1.0\" encoding=\"utf-8\"?> <AbsoluteLayout xmlns:android=\"http://schemas.android.com/apk/res/android\" android:orientation=\"vertical\" android:layout_width=\"fill_parent\" android:layout_height=\"fill_parent\" android:id=\"@+id/widget0\" > <Button android:layout_width=\"wrap_content\" android:layout_height=\"wrap_content\" android:id=\"@+id/button_search\" android:layout_x=\"253px\" android:layout_y=\"5px\" android:text=\"@string/toSearch\" /> <EditText android:layout_width=\"wrap_content\" android:layout_height=\"wrap_content\" android:id=\"@+id/key\" android:text=\"821077962.db\" /> <TextView android:layout_width=\"fill_parent\" android:layout_height=\"370px\" android:id=\"@+id/TextView_Result\" android:layout_x=\"0px\" android:layout_y=\"60px\" /> </AbsoluteLayout>
strings.xml代码:
<?xml version=\"1.0\" encoding=\"utf-8\"?> <resources> <string name=\"hello\">Hello World, Activity07!</string> <string name=\"app_name\">文件搜索</string> <string name=\"toSearch\">搜索</string> <string name=\"info\">系统SDCard目录文件路径:\\n</string> <string name=\"pleaseInput\">请输入关键字!</string> <string name=\"notFound\">SD卡中没有相关文件!!</string> <string name=\"pathError\">读取路径出错!!</string> </resources>
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