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;
}