android读取data/data/包名/file路径下的txt文件

文件不能太大否则会报内存溢出
import java.io.FileInputStream;import org.apache.http.util.EncodingUtils;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class ReaddataPathActivity extends Activity {    TextView textView;    // 这个是读取data/data/包名/file路径下的文件    // 这个目录可以用getFilesDir()方法得到    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        textView = (TextView) findViewById(R.id.tvtext);        String txt = "";        try {            // 获取文件            FileInputStream fin = openFileInput("name.txt");            // 获得长度            int length = fin.available();            // 创建字节数组            byte[] buffer = new byte[length];            // 读取内容            fin.read(buffer);            // 获得编码格式            String type = codetype(buffer);            // 按编码格式获得内容            txt = EncodingUtils.getString(buffer, type);            textView.setText(txt);        }        catch(Exception e) {            // TODO: handle exception        }    }    private String codetype(byte[] head) {        String type = "";        byte[] codehead = new byte[3];        System.arraycopy(head, 0, codehead, 0, 3);        if(codehead[0] == -1 && codehead[1] == -2) {            type = "UTF-16";        }        else if(codehead[0] == -2 && codehead[1] == -1) {            type = "UNICODE";        }        else if(codehead[0] == -17 && codehead[1] == -69 && codehead[2] == -65) {            type = "UTF-8";        }        else {            type = "GB2312";        }        return type;    }}
更多相关文章

随机推荐
