Android 读取txt,按行读取的实例讲解

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一个TXT 文件对其进行读取，并且每行都单个存储读取

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									public class MainActivity extends AppCompatActivity {

									 private TextView textView,textView2,textView3;

									 private Button click;

									 @Override

									 protected void onCreate(Bundle savedInstanceState) {

									  super.onCreate(savedInstanceState);

									  setContentView(R.layout.activity_main);

									  textView = (TextView) findViewById(R.id.textView);

									  textView2 = (TextView) findViewById(R.id.textView2);

									  textView3 = (TextView) findViewById(R.id.textView3);

									  String s1 = Txt().get(0);//从Map get （key = 0）的value

									  String s2 = Txt().get(1);

									  String s3 = Txt().get(2);

									  textView.setText(s1);

									  textView2.setText(s2);

									  textView3.setText(s3);

									 }

									 public Map<Integer, String> Txt() {

									  //将读出来的一行行数据使用Map存储

									  String filePath = "/sdcard/sdl_log.txt";//手机上地址

									  Map<Integer, String> map = new HashMap<Integer, String>();

									  try {

									   File file = new File(filePath);

									   int count = 0;//初始化 key值

									   if (file.isFile() && file.exists()) {  //文件存在的前提

									    InputStreamReader isr = new InputStreamReader(new FileInputStream(file));

									    BufferedReader br = new BufferedReader(isr);

									    String lineTxt = null;

									    while ((lineTxt = br.readLine()) != null) {  //

									     if (!"".equals(lineTxt)) {

									      String reds = lineTxt.split("\\+")[0];  //java 正则表达式

									      map.put(count, reds);//依次放到map 0，value0;1,value2

									      count++;

									     }

									    }

									    isr.close();

									    br.close();

									   }else {

									    Toast.makeText(getApplicationContext(),"can not find file",Toast.LENGTH_SHORT).show();//找不到文件情况下

									   }

									  } catch (Exception e) {

									   e.printStackTrace();

									  }

									  return map;

									 }

									}