android如何在當前app的目錄下建立一個檔案

package com.example.listfile;    import java.io.File;   import java.io.IOException;        import android.app.Activity;   import android.content.Context;import android.widget.TextView;import android.os.Bundle;     import android.os.Process;    public class MainActivity extends Activity{    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        int myProcessID = Process.myPid();        File yygypath = this.getFilesDir();//this.getCacheDir();        String yygypathstr = yygypath.toString();        File file = new File(yygypath, "yygytest");         try {            file.createNewFile();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        yygypathstr = yygypathstr + " pid is " + myProcessID;                    TextView  tv = new TextView(this);        tv.setText(yygypathstr);        setContentView(tv);    }    public void onDestory()    {        super.onDestroy();        this.finish();        android.os.Process.killProcess(android.os.Process.myPid());        System.exit(0);         }}

主要是這兩個函數：

this.getFilesDir(); 這個是得到當前app目錄下的files目錄路徑

this.getCacheDir(); 這個是得到當前app目錄下的cache目錄路徑

結果：

adb shell result:

root@generic:/data/data/com.example.listfile/files # ll

-rw------- u0_a53   u0_a53          0 2014-04-21 13:38 yygytest

root@generic:/data/data/com.example.listfile/files #

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