Android 单字阅读

package com.desmand.screencapture;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MainActivity extends Activity implements View.OnClickListener, Runnable {

    private static String TAG = "ScreenCapture";
    Thread showTextThread;
    Button start_service_btn;
    private TextView show_text_tv;
    private String readerString;
    private String file_path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Panasonic/";
    private String fileName = file_path + "test.txt";
    private char testChar;

    private boolean isRun;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(null);

        startService(new Intent(this, ScreenCaptureService.class));
        this.finish();

//        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        start_service_btn = (Button) findViewById(R.id.start_service_btn);
        start_service_btn.setOnClickListener(this);
        show_text_tv = (TextView) findViewById(R.id.show_text_tv);

        showTextThread = new Thread(this);

        File filePath = new File(file_path);
        if (!filePath.exists()) {
            Log.i(TAG, "----------ERROR----------");
        }
    }

    Handler myHandler = new Handler() {
        public void handleMessage(Message msg) {
            show_text_tv.setText(String.valueOf(testChar));
            super.handleMessage(msg);
        }
    };

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.start_service_btn:
                if (showTextThread.isAlive()) {
                    isRun = false;
                    showTextThread.interrupt();
                }
                showTextThread = new Thread(this);
                showTextThread.start();
                isRun = true;

//                startService(new Intent(this, ScreenCaptureService.class));
//                this.finish();
                break;
            default:
                break;
        }
    }

    @Override
    public void run() {
//        List<String> lines = new ArrayList<>();
//        BufferedReader br = null;
//        try {
//            File file = new File(fileName);
//            InputStream inputStream = new FileInputStream(file);
//            Reader reader = new InputStreamReader(inputStream, "GBK");
//            br = new BufferedReader(reader);
//        } catch (UnsupportedEncodingException | FileNotFoundException e) {
//            e.printStackTrace();
//        }
//
//        try {
//            while ((readerString = br.readLine()) != null) {
//                lines.add(readerString);
//                myHandler.sendEmptyMessage(0);
//                Log.i(TAG, readerString);
//                Thread.sleep(200);
//            }
//            br.close();
//        } catch (IOException | InterruptedException e) {
//            e.printStackTrace();
//        }


        File file = new File(fileName);
        BufferedReader reader;
        String text = "";
        try {
            FileInputStream fis = new FileInputStream(file);
            BufferedInputStream in = new BufferedInputStream(fis);
            in.mark(4);
            byte[] first3bytes = new byte[3];
            in.read(first3bytes);//找到文档的前三个字节并自动判断文档类型。
            in.reset();
            if (first3bytes[0] == (byte) 0xEF && first3bytes[1] == (byte) 0xBB && first3bytes[2] == (byte) 0xBF) {// utf-8
                reader = new BufferedReader(new InputStreamReader(in, "utf-8"));
            } else if (first3bytes[0] == (byte) 0xFF && first3bytes[1] == (byte) 0xFE) {
                reader = new BufferedReader(new InputStreamReader(in, "unicode"));
            } else if (first3bytes[0] == (byte) 0xFE && first3bytes[1] == (byte) 0xFF) {
                reader = new BufferedReader(new InputStreamReader(in, "utf-16be"));
            } else if (first3bytes[0] == (byte) 0xFF && first3bytes[1] == (byte) 0xFF) {
                reader = new BufferedReader(new InputStreamReader(in, "utf-16le"));
            } else {
                reader = new BufferedReader(new InputStreamReader(in, "GBK"));
            }

            readerString = reader.readLine();
            while (readerString != null) {
                if (isRun) {
                    for (int i = 0; i < readerString.length(); i++) {// 遍历字符串每一个字符

                        // 使用正则表达式判断字符是否属于汉字编码
                        Pattern p = Pattern.compile("[u4e00-u9fa5]");
                        Matcher m = p.matcher(readerString);
                        if (m.find()) {// 如果是汉字
                            testChar = readerString.charAt(i);
                            Log.i(TAG, "testChar: " + testChar);
                            myHandler.sendEmptyMessage(0);
                        }

                        Thread.sleep(300);

//                    String[] splitStr = readerString.split("[\s,.;。，；]");
//                    for (String str : splitStr) {
//                        if (!str.trim().equals("")) {
//                            testChar = str.trim();
//                            Log.i(TAG, "testChar: " + testChar);
//                            myHandler.sendEmptyMessage(0);
//                            Thread.sleep(400);
//                        }
//                    }

//                    StringBuffer english = new StringBuffer();
//                    String regex = "[^u4e00-u9fa5。，？”“《》：！——-、]";
//                    Pattern pattern = Pattern.compile(regex);
//                    Matcher matcher = pattern.matcher(readerString);
//                    while (matcher.find()) {
//                        testChar = null;
//                        english.append(matcher.group(1));
//                        testChar = english.toString();
//                        Log.i(TAG, "testChar: " + testChar);
//                        myHandler.sendEmptyMessage(0);
//                    }

                    }
                }
                readerString = reader.readLine();
            }
            reader.close();
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }


    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            isRun = false;
            this.finish();
        }
        return super.onKeyDown(keyCode, event);
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        isRun = false;
        Toast.makeText(getApplicationContext(), "MainActivity onDestroy", Toast.LENGTH_SHORT).show();
    }


}