安卓写文件

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package pw.pw11.writetext;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.EditText;public class MainActivity extends AppCompatActivity {    private EditText edit;    private String path;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        edit = (EditText) findViewById(R.id.editText);        path = getInnerSDCardPath();    }    @Override    protected void onDestroy() {        super.onDestroy();        String content = edit.getText().toString();        WriteText(path,"test.txt",content,false);    }    public String getInnerSDCardPath() {        return android.os.Environment.getExternalStorageDirectory().getPath();    }    public void WriteText(String path,String filename,String content,boolean append){        java.io.FileOutputStream fs=null;        try {            java.io.File file = new java.io.File(path+"/"+filename);            fs = new java.io.FileOutputStream(file,append);            fs.write(content.getBytes());        } catch (java.io.IOException e) {            e.printStackTrace();        } finally {            try {                if (fs != null) {                    fs.close();                }            } catch (java.io.IOException e) {                e.printStackTrace();            }        }    }}
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