去除Activity的标题,使用一句java语句

将android的Activity中的标题(title)去除
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helloworld.zip 预估大小:46个文件
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helloworld 文件夹
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.project 846B
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project.properties 563B
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src 文件夹
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com 文件夹
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example 文件夹
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helloworld 文件夹
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MainActivity.java 651B
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AndroidManifest.xml 887B
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res 文件夹
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drawable-ldpi 文件夹
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drawable-hdpi 文件夹
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ic_launcher.png 7KB
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mingren.png 326KB
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values-v11 文件夹
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styles.xml 334B
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menu 文件夹
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main.xml 372B
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drawable-mdpi 文件夹
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ic_launcher.png 4KB
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layout 文件夹
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fragment_main.xml 708B
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activity_main.xml 254B
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drawable-xxhdpi 文件夹
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ic_launcher.png 24KB
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drawable-xhdpi 文件夹
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ic_launcher.png 12KB
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values-w820dp 文件夹
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dimens.xml 381B
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values 文件夹
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strings.xml 227B
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styles.xml 697B
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dimens.xml 220B
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values-v14 文件夹
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styles.xml 391B
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assets 文件夹
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gen 文件夹
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com 文件夹
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example 文件夹
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helloworld 文件夹
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BuildConfig.java 164B
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R.java 3KB
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libs 文件夹
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android-support-v4.jar 613KB
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.classpath 475B
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proguard-project.txt 781B
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ic_launcher-web.png 50KB
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bin 文件夹
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resources.ap_ 280KB
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classes 文件夹
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com 文件夹
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example 文件夹
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helloworld 文件夹
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R$layout.class 452B
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R$style.class 443B
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R$dimen.class 473B
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BuildConfig.class 353B
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R$drawable.class 450B
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R$attr.class 352B
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R$id.class 405B
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R.class 713B
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R$string.class 484B
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R$menu.class 400B
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MainActivity.class 525B
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AndroidManifest.xml 887B
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dexedLibs 文件夹
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android-support-v4-c708c44c1d35091b467999431aad060d.jar 229KB
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jarlist.cache 120B
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res 文件夹
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crunch 文件夹
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drawable-hdpi 文件夹
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ic_launcher.png 6KB
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mingren.png 239KB
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drawable-mdpi 文件夹
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ic_launcher.png 3KB
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drawable-xxhdpi 文件夹
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ic_launcher.png 17KB
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drawable-xhdpi 文件夹
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ic_launcher.png 9KB
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classes.dex 676KB
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helloworld.apk 513KB
...
zip 文件大小:2.43MB