Android double和，&&

-5

BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")); 
String line; 
while ((line = br.readLine()) != null && 'v' == line.charAt(0)) 
{ 
    // perform your task here 

    String[] separated = line.split(" "); 
    Log.d("bbb", separated[0].toString()); 
} 

07-02 23:17:42.127: E/Trace(14343): error opening trace file: No such file or directory (2) 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapUtilization:0.25 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapIdealFree:8388608 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapConcurrentStart:2097152 
07-02 23:17:42.167: D/aaa(14343): It worked! 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libEGL_adreno200.so 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libGLESv1_CM_adreno200.so 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libGLESv2_adreno200.so 
07-02 23:17:42.397: I/Adreno200-EGLSUB(14343): <ConfigWindowMatch:2087>: Format RGBA_8888. 
07-02 23:17:42.417: E/(14343): <s3dReadConfigFile:75>: Can't open file for reading 
07-02 23:17:42.417: E/(14343): <s3dReadConfigFile:75>: Can't open file for reading 
07-02 23:17:42.417: D/OpenGLRenderer(14343): Enabling debug mode 0

增加了double，似乎是停止了流的讀取過程。如果我刪除「& &‘V’== line.charAt（0）」，它工作正常，並給出了這樣的輸出：Android double和，&&

07-02 23:17:42.127: E/Trace(14343): error opening trace file: No such file or directory (2) 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapUtilization:0.25 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapIdealFree:8388608 
07-02 23:17:42.127: D/ActivityThread(14343): setTargetHeapConcurrentStart:2097152 
07-02 23:17:42.167: D/aaa(14343): It worked! 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libEGL_adreno200.so 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libGLESv1_CM_adreno200.so 
07-02 23:17:42.337: D/libEGL(14343): loaded /system/lib/egl/libGLESv2_adreno200.so 
07-02 23:17:42.397: I/Adreno200-EGLSUB(14343): <ConfigWindowMatch:2087>: Format RGBA_8888. 
07-02 23:17:42.417: E/(14343): <s3dReadConfigFile:75>: Can't open file for reading 
07-02 23:17:42.417: E/(14343): <s3dReadConfigFile:75>: Can't open file for reading 
07-02 23:17:42.417: D/OpenGLRenderer(14343): Enabling debug mode 0 
07-02 23:20:47.264: E/Trace(14481): error opening trace file: No such file or directory (2) 
07-02 23:20:47.264: D/ActivityThread(14481): setTargetHeapUtilization:0.25 
07-02 23:20:47.264: D/ActivityThread(14481): setTargetHeapIdealFree:8388608 
07-02 23:20:47.264: D/ActivityThread(14481): setTargetHeapConcurrentStart:2097152 
07-02 23:20:47.304: D/aaa(14481): It worked! 
07-02 23:20:47.304: D/bbb(14481): # 
07-02 23:20:47.304: D/bbb(14481): # 
07-02 23:20:47.304: D/bbb(14481): # 
07-02 23:20:47.304: D/bbb(14481): # 
07-02 23:20:47.304: D/bbb(14481): # 
07-02 23:20:47.304: D/bbb(14481): v 
07-02 23:20:47.304: D/bbb(14481): v 
07-02 23:20:47.304: D/bbb(14481): v 
07-02 23:20:47.304: D/bbb(14481): v 
07-02 23:20:47.314: D/bbb(14481): v

來源

2013-07-03 Giuseppe

所以，如果你不需要'&&' v'== line.charAt（0）'你爲什麼把它放在那裏？ –

我正在嘗試檢查僅以'v'開頭的行.... – Giuseppe

考慮從您的問題中刪除不必要的輸出。只保留由有問題的代碼段產生的輸出。另外，如果您在這裏提供樣本輸入，這將有所幫助。 –

如果你的問題是：我如何只處理開始的行v？然後改變：

while ((line = br.readLine()) != null && 'v' == line.charAt(0))

到

while ((line = br.readLine()) != null) { 
    if (line.trim().startsWith("v")) { 
     ... 
    } 
}

代碼之前，將盡快退出循環作爲非V字顯示出來

來源

2013-07-03 06:26:27

我更改了代碼，但日誌中沒有輸出任何以v開頭的行，並且存在一些錯誤。 – Giuseppe

當我運行startsWith（「v」）代碼時，日誌本質上變成了我的文章中的第一個日誌條目... – Giuseppe

也許在v之前有空格？檢查我更新的答案。 –

Android double和，&&

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