protectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);System.out.println(getFromAssets("cities.json"));Log.e("getFromAssets",getFromAssets("cities.json")+"----------");}publicStringgetFromAssets(StringfileName){try{InputStreamReaderinputReader=newInputStreamReader(getResources().getAssets().open(fileName));BufferedReaderbufReader=newBufferedReader(inputReader);Stringline="";result="";while((line=bufReader.readLine())!=null)result+=line;}catch(Exceptione){e.printStackTrace();}finally{returnresult;}}

运行效果：