public class ReflectionPerformanceActivity extends Activity{ private TextView mExecuteResultTxtView = null; private EditText mExecuteCountEditTxt = null; private Executor mPerformanceExecutor = Executors.newSingleThreadExecutor(); private static final int AVERAGE_COUNT = 10; @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_reflection_performance_layout); mExecuteResultTxtView = (TextView)findViewById(R.id.executeResultTxtId); mExecuteCountEditTxt = (EditText)findViewById(R.id.executeCountEditTxtId); } public void onClick(View v){ switch(v.getId()){ case R.id.executeBtnId:{ execute(); } break; default:{ } break; } } private void execute(){ mExecuteResultTxtView.setText(""); mPerformanceExecutor.execute(new Runnable(){ @Override public void run(){ long costTime = 0; int executeCount = Integer.parseInt(mExecuteCountEditTxt.getText().toString()); long reflectMethodCostTime=0,normalMethodCostTime=0,reflectFieldCostTime=0,normalFieldCostTime=0; updateResultTextView(executeCount "毫秒耗时情况测试"); for(int index = 0; index < AVERAGE_COUNT; index ){ updateResultTextView("第 " (index 1) " 次"); costTime = getNormalCallCostTime(executeCount); reflectMethodCostTime = costTime; updateResultTextView("执行直接调用方法耗时:" costTime " 毫秒"); costTime = getReflectCallMethodCostTime(executeCount); normalMethodCostTime = costTime; updateResultTextView("执行反射调用方法耗时:" costTime " 毫秒"); costTime = getNormalFieldCostTime(executeCount); reflectFieldCostTime = costTime; updateResultTextView("执行普通调用实例耗时:" costTime " 毫秒"); costTime = getReflectCallFieldCostTime(executeCount); normalFieldCostTime = costTime; updateResultTextView("执行反射调用实例耗时:" costTime " 毫秒"); } updateResultTextView("执行直接调用方法平均耗时:" reflectMethodCostTime/AVERAGE_COUNT " 毫秒"); updateResultTextView("执行反射调用方法平均耗时:" normalMethodCostTime/AVERAGE_COUNT " 毫秒"); updateResultTextView("执行普通调用实例平均耗时:" reflectFieldCostTime/AVERAGE_COUNT " 毫秒"); updateResultTextView("执行反射调用实例平均耗时:" normalFieldCostTime/AVERAGE_COUNT " 毫秒"); } }); } private long getReflectCallMethodCostTime(int count){ long startTime = System.currentTimeMillis(); for(int index = 0 ; index < count; index ){ ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); try{ Method setmLanguageMethod = programMonkey.getClass().getMethod("setmLanguage", String.class); setmLanguageMethod.setAccessible(true); setmLanguageMethod.invoke(programMonkey, "Java"); }catch(IllegalAccessException e){ e.printStackTrace(); }catch(InvocationTargetException e){ e.printStackTrace(); }catch(NoSuchMethodException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; } private long getReflectCallFieldCostTime(int count){ long startTime = System.currentTimeMillis(); for(int index = 0 ; index < count; index ){ ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); try{ Field ageField = programMonkey.getClass().getDeclaredField("mLanguage"); ageField.set(programMonkey, "Java"); }catch(NoSuchFieldException e){ e.printStackTrace(); }catch(IllegalAccessException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; } private long getNormalCallCostTime(int count){ long startTime = System.currentTimeMillis(); for(int index = 0 ; index < count; index ){ ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); programMonkey.setmLanguage("Java"); } return System.currentTimeMillis()-startTime; } private long getNormalFieldCostTime(int count){ long startTime = System.currentTimeMillis(); for(int index = 0 ; index < count; index ){ ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); programMonkey.mLanguage = "Java"; } return System.currentTimeMillis()-startTime; } private void updateResultTextView(final String content){ ReflectionPerformanceActivity.this.runOnUiThread(new Runnable(){ @Override public void run(){ mExecuteResultTxtView.append(content); mExecuteResultTxtView.append("\n"); } }); } }
private long getReflectCallMethodCostTime(int count){ long startTime = System.currentTimeMillis(); ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); Method setmLanguageMethod = null; try{ setmLanguageMethod = programMonkey.getClass().getMethod("setmLanguage", String.class); setmLanguageMethod.setAccessible(true); }catch(NoSuchMethodException e){ e.printStackTrace(); } for(int index = 0 ; index < count; index ){ try{ setmLanguageMethod.invoke(programMonkey, "Java"); }catch(IllegalAccessException e){ e.printStackTrace(); }catch(InvocationTargetException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; } private long getReflectCallFieldCostTime(int count){ long startTime = System.currentTimeMillis(); ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); Field ageField = null; try{ ageField = programMonkey.getClass().getDeclaredField("mLanguage"); }catch(NoSuchFieldException e){ e.printStackTrace(); } for(int index = 0 ; index < count; index ){ try{ ageField.set(programMonkey, "Java"); }catch(IllegalAccessException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; }
private long getReflectCallMethodCostTime(int count){ long startTime = System.currentTimeMillis(); ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); for(int index = 0 ; index < count; index ){ try{ Method setmLanguageMethod = programMonkey.getClass().getMethod("setmLanguage", String.class); }catch(NoSuchMethodException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; } private long getReflectCallFieldCostTime(int count){ long startTime = System.currentTimeMillis(); ProgramMonkey programMonkey = new ProgramMonkey("小明", "男", 12); for(int index = 0 ; index < count; index ){ try{ Field ageField = programMonkey.getClass().getDeclaredField("mLanguage"); }catch(NoSuchFieldException e){ e.printStackTrace(); } } return System.currentTimeMillis()-startTime; }