字符串比较不起作用(android)

Question

我的字符串比较不起作用.我不知道为什么.即使两个字符串不相同,它也会返回它总是相等的

这是我使用的代码

if(videoFile.equals(LangSelect.INSTRUCTION_01));
    {
        Log.i("InstructionVideo", "video and instruction are equal\n"+ videoFile + "\n" + LangSelect.INSTRUCTION_01);

        //hideBackButton();
    }

videoFile是intro_x.mp4,其中x从0变为4,而INSTRUCTION_01是into_0.mp4

我的onCreate的一部分确实设置了videoFile变量

    //get which video file to play
    videoFile = getIntent().getExtras().getString("PlayVideo");

    Log.i("InstructionVideo", "videoFile name: " +videoFile);

这是该部分的LogCat

 05-15 14:59:57.078: I/InstructionVideo(2952): videoFile name: intro_0.mp4
 05-15 14:59:57.085: I/InstructionVideo(2952): video and instruction are equal
 05-15 14:59:57.085: I/InstructionVideo(2952): intro_0.mp4
 05-15 14:59:57.085: I/InstructionVideo(2952): intro_0.mp4
 05-15 14:59:57.124: I/surfaceCreated(2952): created
 05-15 14:59:58.324: I/LangSelect(2952): 7
 05-15 14:59:58.390: I/InstructionVideo(2952): videoFile name: intro_1.mp4
 05-15 14:59:58.390: I/InstructionVideo(2952): video and instruction are equal 
 05-15 14:59:58.390: I/InstructionVideo(2952): intro_1.mp4
 05-15 14:59:58.390: I/InstructionVideo(2952): intro_0.mp4
 05-15 14:59:58.433: I/surfaceCreated(2952): created
 05-15 14:59:58.484: I/SurfaceDestroyed(2952): destroyed
 05-15 15:00:07.382: I/LangSelect(2952): 7
 05-15 15:00:07.445: I/InstructionVideo(2952): videoFile name: intro_2.mp4
 05-15 15:00:07.449: I/InstructionVideo(2952): video and instruction are equal
 05-15 15:00:07.449: I/InstructionVideo(2952): intro_2.mp4
 05-15 15:00:07.449: I/InstructionVideo(2952): intro_0.mp4
 05-15 15:00:07.488: I/surfaceCreated(2952): created
 05-15 15:00:07.539: I/SurfaceDestroyed(2952): destroyed
 05-15 15:00:23.535: I/LangSelect(2952): 7
 05-15 15:00:23.597: I/InstructionVideo(2952): videoFile name: intro_3.mp4
 05-15 15:00:23.597: I/InstructionVideo(2952): video and instruction are equal
 05-15 15:00:23.597: I/InstructionVideo(2952): intro_3.mp4
 05-15 15:00:23.597: I/InstructionVideo(2952): intro_0.mp4
 05-15 15:00:23.632: I/surfaceCreated(2952): created
 05-15 15:00:23.687: I/SurfaceDestroyed(2952): destroyed
 05-15 15:00:38.843: I/LangSelect(2952): 7
 05-15 15:00:38.902: I/InstructionVideo(2952): videoFile name: intro_4.mp4
 05-15 15:00:38.906: I/InstructionVideo(2952): video and instruction are equal
 05-15 15:00:38.906: I/InstructionVideo(2952): intro_4.mp4
 05-15 15:00:38.906: I/InstructionVideo(2952): intro_0.mp4
 05-15 15:00:38.941: I/surfaceCreated(2952): created
 05-15 15:00:38.992: I/SurfaceDestroyed(2952): destroyed
 05-15 15:01:13.242: I/LangSelect(2952): 7
 05-15 15:01:13.296: I/SurfaceDestroyed(2952): destroyed

它表明,即使我比较它们,它们返回真实但不是

Answer 1

;在"if"行的末尾有一个终止"if"语句,因此总是执行以下块.