文件存储读写与动态添加控件结合

闲来无事,把之前的东西结合用了一下:(File)文件存储读写与动态添加控件结合

1.存储文件

  private void saveFile() {

        String fileName = "Gary";
        String content = "谁啊";
        try {
            FileOutputStream fileOutputStream = openFileOutput(fileName, Context.MODE_PRIVATE);
            fileOutputStream.write(content.getBytes());
            fileOutputStream.close();
        } catch (java.io.IOException e) {
            e.printStackTrace();
        }


    }

文件存在/data/data/<应用程序名>/files/fileName(你自己定义的文件名)

2.读取文件并动态添加控件

 private void readFile() {

        try {
            FileInputStream fileInputStream = openFileInput("Gary");
            int length = fileInputStream.available();
            byte[] buffer = new byte[length];
            fileInputStream.read(buffer);
            //6.0sdk中移除了org.apache.http.util.EncodingUtils等相关类,可以在gradle配置
            String str = EncodingUtils.getString(buffer, "UTF-8");
            fileInputStream.close();
            TextView tv = new TextView(this);
            tv.setTextSize(30);
            tv.setText(str);
            ViewGroup layout = (ViewGroup) findViewById(R.id.layout_main);
            layout.addView(tv);

        } catch (java.io.IOException e) {
            e.printStackTrace();
        }
    }

//6.0sdk中移除了org.apache.http.util.EncodingUtils等相关类,可以在gradle配置

添加:    useLibrary ‘org.apache.http.legacy’

效果图gif: