我的布局花了太多时间在实际设备上加载大约2-3秒。我的布局有很多视图，范围从40-60个视图。我正在检查OnCreate()中的各种条件。所以有人可以建议我如何更快地加载我的活动。并且大多数视图都有背景图像。实际上我的整个布局都是ImageView。
以下是onCreate()
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fueladd_layout);
face2=Typeface.createFromAsset(getAssets(),"digital.ttf");
typewriter=Typeface.createFromAsset(getAssets(),"veteran_typewriter.ttf");
Display display=getWindowManager().getDefaultDisplay();
width=display.getWidth();
height=display.getHeight();
dbc=new Databaseconnection(this);
sdb=dbc.getWritableDatabase();
sdb=dbc.getReadableDatabase();
c = Calendar.getInstance();
fyear = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
date();
mp1=MediaPlayer.create(getBaseContext(), R.raw.button_click);
newcarmenu=(RelativeLayout) findViewById(R.id.newcarmenu);
topmenu=(RelativeLayout) findViewById(R.id.topmenu);
newnotelayout=(RelativeLayout) findViewById(R.id.newnotelayout);
layout_mileage=(RelativeLayout) findViewById(R.id.layout_mileage);
img_tabdashboard=(ImageView) findViewById(R.id.img_tabdashboard);
img_tabdashboard.setOnClickListener(this);
img_tabexpenses=(ImageView) findViewById(R.id.img_tabexpenses);
img_tabexpenses.setImageDrawable(img_tabexpenses.getResources().getDrawable(R.drawable.tabexpensespressed));
img_tabexpenses.setOnClickListener(this);
img_tabfinancial=(ImageView) findViewById(R.id.img_tabfinancial);
img_tabfinancial.setOnClickListener(this);
img_tabtrip=(ImageView) findViewById(R.id.img_tabtrip);
img_tabtrip.setOnClickListener(this);
img_menu=(ImageView) findViewById(R.id.img_menu);
img_menu.getLayoutParams().width=(int) (width*0.109375);
img_menu.setOnClickListener(this);
img_preferences=(ImageView) findViewById(R.id.img_preferences);
img_preferences.getLayoutParams().width=(int) (width*0.109375);
img_preferences.setOnClickListener(this);
img_mycar=(ImageView)findViewById(R.id.img_mycar);
img_mycar.setOnClickListener(this);
imgnotesdone=(ImageView)findViewById(R.id.imgnotesdone);
imgnotesdone.setOnClickListener(this);
img_aboutus=(ImageView)findViewById(R.id.img_aboutus);
img_aboutus.setOnClickListener(this);
img_editcar=(ImageView)findViewById(R.id.img_editcar);
img_editcar.setOnClickListener(this);
img_exit=(ImageView)findViewById(R.id.img_exit);
img_exit.setOnClickListener(this);
img_fuel=(ImageView) findViewById(R.id.img_fuel);
img_fuel.setBackgroundResource(R.drawable.fuel2);
img_fuel.setOnClickListener(this);
img_toll=(ImageView) findViewById(R.id.img_toll);
img_toll.setOnClickListener(this);
img_parking=(ImageView) findViewById(R.id.img_parking);
img_parking.setOnClickListener(this);
img_puc=(ImageView) findViewById(R.id.img_puc);
img_puc.setOnClickListener(this);
img_oil=(ImageView) findViewById(R.id.img_oil);
img_oil.setOnClickListener(this);
img_service=(ImageView) findViewById(R.id.img_service);
img_service.setOnClickListener(this);
img_add=(ImageView) findViewById(R.id.img_save);
img_add.setOnClickListener(this);
img_view=(ImageView) findViewById(R.id.img_view);
img_view.setOnClickListener(this);
img_addnewcar=(ImageView) findViewById(R.id.img_addnewcar);
img_addnewcar.setOnClickListener(this);
img_addnewbike=(ImageView) findViewById(R.id.img_addnewbike);
img_addnewbike.setOnClickListener(this);
img_usedcar=(ImageView) findViewById(R.id.img_usedcar);
img_usedcar.setOnClickListener(this);
img_usedcar=(ImageView) findViewById(R.id.img_usedbike);
img_usedcar.setOnClickListener(this);
img_menuexit=(ImageView) findViewById(R.id.img_menuexit);
img_menuexit.setOnClickListener(this);
img_loc_picker = (ImageView) this.findViewById(R.id.img_loc_picker);
img_loc_picker.setOnClickListener(this);
txt_title=(TextView) findViewById(R.id.txttitle);
txt_title.setTypeface(face2,Typeface.BOLD);
txt_title.setText("FUEL");
layout_list=(RelativeLayout) findViewById(R.id.layout_list);
animationBottomIn = AnimationUtils.loadAnimation(layout_list.getContext(), R.anim.slide_in_up);
animationBottomOut = AnimationUtils.loadAnimation(layout_list.getContext(), R.anim.slide_out_down);
animationRightIn = AnimationUtils.loadAnimation(layout_list.getContext(), R.anim.slide_in_right);
animationRightOut = AnimationUtils.loadAnimation(layout_list.getContext(), R.anim.slide_out_right);
list_type= (ListView) findViewById(R.id.list_type);
list_type.setOnItemClickListener(this);
list_location= (ListView) findViewById(R.id.list_location);
list_location.setOnItemClickListener(this);
txt_type_loc=(TextView) findViewById(R.id.txt_type_loc);
txt_type_loc.setTypeface(typewriter);
img_arrow_down = (ImageView) this.findViewById(R.id.img_arrow_down);
img_arrow_down.setOnClickListener(this);
txtselectdate=(TextView) findViewById(R.id.txt_currentdate);
txtselectdate.setTypeface(typewriter);
txtnewnotes=(TextView) findViewById(R.id.txtnewnotes);
txtnewnotes.setTypeface(typewriter);
txtcdate=(TextView) findViewById(R.id.txtcdate);
txtcdate.setTypeface(typewriter);
txtcdate.setOnClickListener(this);
txtcurrentkm=(TextView) findViewById(R.id.txt_currentkm);
txtcurrentkm.setTypeface(typewriter);
txtpreviouskm=(TextView) findViewById(R.id.txt_previouskm);
txtpreviouskm.setTypeface(typewriter);
txtfuel=(TextView) findViewById(R.id.txt_quantity);
txtfuel.setTypeface(typewriter);
txtrate=(TextView) findViewById(R.id.txt_rate);
txtrate.setTypeface(typewriter);
txtamount=(TextView) findViewById(R.id.txt_amount);
txtamount.setTypeface(typewriter);
txtmileage=(TextView) findViewById(R.id.txt_mileage);
txtmileage.setTypeface(typewriter);
txtlocation=(TextView) findViewById(R.id.txt_location);
txtlocation.setTypeface(typewriter);
txtbrand=(TextView) findViewById(R.id.txt_brand);
txtbrand.setTypeface(typewriter);
txtnote=(TextView) findViewById(R.id.txt_note);
txtnote.setTypeface(typewriter);
editbrand=(EditText) findViewById(R.id.edit_brand);
editbrand.setTypeface(typewriter);
editlocation=(EditText) findViewById(R.id.edit_location);
editlocation.setTypeface(typewriter);
editnewnotes=(EditText) findViewById(R.id.editnewnotes);
editnewnotes.setTypeface(typewriter);
img_date_picker = (ImageView) this.findViewById(R.id.img_date_picker);
img_date_picker.setOnClickListener(this);
img_loc_picker = (ImageView) this.findViewById(R.id.img_loc_picker);
img_loc_picker.setOnClickListener(this);
img_brand_picker = (ImageView) this.findViewById(R.id.img_brand_picker);
img_brand_picker.setOnClickListener(this);
imgnotepicker = (ImageView) this.findViewById(R.id.imgnotepicker );
imgnotepicker .setOnClickListener(this);
//this will set the text of edit view
//the 1st record value is retrived and displayed
//if no record is present than editview is empty
loc_select_Query = "select item From FuelLocation";
Cursor cursor_loc = sdb.rawQuery(loc_select_Query, null);
int count=cursor_loc.getCount();
cursor_loc.moveToFirst();
if(count>1)
{
editlocation.setText(cursor_loc.getString(0));
}
//this will set the text of edit view of brand
//the 1st record value is retrived and displayed
//if no record is present than editview is empty
brand_select_Query = "select brand From FuelBrand";
Log.i("select_Query", brand_select_Query);
Cursor cursor_brand = sdb.rawQuery(brand_select_Query, null);
int count1=cursor_brand.getCount();
cursor_brand.moveToFirst();
if(count1>1)
{
editbrand.setText(cursor_brand.getString(0));
}
editcurrentkm=(EditText) findViewById(R.id.edit_currentkm);
editcurrentkm.setTypeface(typewriter);
editpreviouskm=(EditText) findViewById(R.id.edit_previouskm);
editpreviouskm.setTypeface(typewriter);
editpreviouskm.setOnFocusChangeListener(new OnFocusChangeListener()
{
public void onFocusChange(View v, boolean hasFocus)
{
if(!hasFocus)
{
String select="Select Fuel_CurrentKm from Fuel ";
Cursor selectcur = sdb.rawQuery(select, null);
selectcur.moveToLast();
Log.i("Record Count",Integer.toString(selectcur.getCount()));
if(selectcur.getCount()>0)
{
Log.i("currentkm",editcurrentkm.getText().toString());
Log.i("currentkm",editcurrentkm.getText().toString());
if(Integer.valueOf(editpreviouskm.getText().toString())<Integer.valueOf(selectcur.getString(0).toString()))
{
msg="Enter previous odometer greater than"+selectcur.getString(0).toString();
showToastMessage(msg);
}
}
}
}
});
editcurrentkm.setOnFocusChangeListener(new OnFocusChangeListener()
{
public void onFocusChange(View v, boolean hasFocus)
{
if(!hasFocus)
{
ckm=editcurrentkm.getText().toString();
if(ckm.equalsIgnoreCase(""))
{
msg="Enter Current Odometer reading";
showToastMessage(msg);
}
else
{
if(Integer.valueOf(editcurrentkm.getText().toString())>Integer.valueOf(editpreviouskm.getText().toString()))
{
if(pcount>1)
{
currentkm=Integer.valueOf(ckm);
calmileage=(currentkm-previouskm)/pquantity;
editmileage.setText(Float.toString(calmileage));
Log.i("Mileage",Float.toString(calmileage));
}
}
else
{
msg="Enter Current Odometer reading Greater than Previous Odometer reading";
showToastMessage(msg);
}
}
}
}
});
editfuel=(EditText) findViewById(R.id.edit_quantity);
editfuel.setTypeface(typewriter);
editrate=(EditText) findViewById(R.id.edit_rate);
editrate.setTypeface(typewriter);
editrate.setOnFocusChangeListener(new OnFocusChangeListener()
{
public void onFocusChange(View arg0, boolean arg1)
{
if(!arg1)
{
if(!editfuel.getText().toString().equalsIgnoreCase(""))
{
fquantity=editfuel.getText().toString();
quantity=Float.valueOf(fquantity);
if(!editrate.getText().toString().equalsIgnoreCase(""))
{
frate=editrate.getText().toString();
total=quantity*Float.valueOf(frate);
editamount.setText(Float.toString(total));
}
}
}
}
});
editamount=(EditText) findViewById(R.id.edit_amount);
editamount.setTypeface(typewriter);
editamount.setOnFocusChangeListener(new OnFocusChangeListener()
{
public void onFocusChange(View arg0, boolean arg1)
{
if(!arg1)
{
if(!editfuel.getText().toString().equalsIgnoreCase(""))
{
fquantity=editfuel.getText().toString();
quantity=Float.valueOf(fquantity);
if(!editamount.getText().toString().equalsIgnoreCase(""))
{
famount=editamount.getText().toString();
rate=Float.valueOf(famount)/quantity;
editrate.setText(Float.toString(rate));
}
}
}
}
});
editmileage=(EditText) findViewById(R.id.edit_mileage);
editmileage.setTypeface(typewriter);
editnote=(EditText) findViewById(R.id.edit_note);
editnote.setTypeface(typewriter);
SharedPreferences myPrefs = this.getSharedPreferences("myPrefs", MODE_WORLD_READABLE);
readsound=myPrefs.getBoolean(SOUND,sound);
car_id= myPrefs.getInt(MY_CAR,count);
Log.i("car id",Integer.toString(car_id));
if(car_id==0)
{
car_id=1;
Log.i("Car_ID",Long.toString(car_id));
}
Intent editintent=getIntent();
String action=editintent.getAction();
Log.i("Action",action);
if(action.equalsIgnoreCase("com.curioussolutions.autoistdiary.fuel.EDIT"))
{
Log.i("inside","edit");
record=(Integer) getIntent().getSerializableExtra("Id");
Log.i("Record",Integer.toString(record));
Cursor editcursor = sdb.rawQuery("select Fuel_Date,Fuel_CurrentKm,Fuel_PreviousKm,Fuel_Quantity,Fuel_Rate,Fuel_Amount,Fuel_Milege,Fuel_Brand,Fuel_Location,Fuel_Note from Fuel where Fuel_Id="+record, null);
count=editcursor.getCount();
editcursor.moveToFirst();
udate=editcursor.getString(0).toString();
Log.i("date",udate);
txtcdate.setText(udate);
Log.i("date",udate);
currentkm=Integer.valueOf(editcursor.getString(1).toString());
editcurrentkm.setText(Integer.toString(currentkm));
Log.i("currentkm",Integer.toString(currentkm));
pkm=Integer.valueOf(editcursor.getString(2).toString());
Log.i("previouskm",Integer.toString(pkm));
editpreviouskm.setText(Integer.toString(pkm));
Log.i("previouskm",Integer.toString(pkm));
quantity=Float.valueOf(editcursor.getString(3).toString());
editfuel.setText(Float.toString(quantity));
Log.i("quantity",Float.toString(quantity));
rate=Float.valueOf(editcursor.getString(4).toString());
editrate.setText(Float.toString(rate));
Log.i("rate",Float.toString(rate));
total=Float.valueOf(editcursor.getString(5).toString());
editamount.setText(Float.toString(total));
Log.i("cost",Float.toString(total));
if(record>1)
{
calmileage=Float.valueOf(editcursor.getString(6).toString());
editmileage.setText(Float.toString(calmileage));
Log.i("mileage",Float.toString(calmileage));
}
if(record==1)
{
layout_mileage.setVisibility(RelativeLayout.GONE);
}
location=editcursor.getString(7).toString();
editlocation.setText(location);
Log.i("location",location);
fbrand=editcursor.getString(8).toString();
editbrand.setText(fbrand);
Log.i("date",fbrand);
notes=editcursor.getString(9).toString();
editnote.setText(notes);
Log.i("notes",notes);
}
if(action.equalsIgnoreCase("com.curioussolutions.autoistdiary.fuel.ADD"))
{
Log.i("inside","add");
String select1="select Fuel_CurrentKm,Fuel_Quantity,Fuel_Rate from Fuel";
Cursor cur = sdb.rawQuery(select1, null);
pcount=cur.getCount()+1;
cur.moveToLast();
if(pcount>1)
{
previouskm=Integer.valueOf(cur.getString(0).toString());
pquantity=Float.valueOf(cur.getString(1).toString());
rate=Float.valueOf(cur.getString(2).toString());
editpreviouskm.setText(Integer.toString(previouskm));
editrate.setText(Float.toString(rate));
}
else
{
layout_mileage.setVisibility(RelativeLayout.GONE);
editpreviouskm.setText("0");
}
date();
txtcdate.setText(date);
}
else
{
layout_mileage.setVisibility(RelativeLayout.GONE);
editpreviouskm.setText("0");
date();
txtcdate.setText(date);
}
}
答案 0 :(得分：1)
以下是一个非常好的解释，您如何优化您的用户界面，以便加快加载速度：Android Performance in Practice by Romain Guy。 我建议你看看。
答案 1 :(得分：0)
尝试使用线程，或者如果在您的方法OnCreate中无法监视是否在完成呈现布局之前调用消耗资源的内容。
答案 2 :(得分：0)
让onCreateComplete尽快完成。不要用它来加载你的观点。 启动AsyncTasks以在findViewById中加载视图。 然后在asyntasks onPostsExecute中，您可以为您的视图设置值，例如将图像设置为您的图像视图等。
值得一试。