quest for android @androidquest - Tumblr Blog

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Quote from Android app

Helloworld, from android app

gestures

activity package com.kyho; import com.kyho.R; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.View; import android.widget.FrameLayout; import android.widget.Toast; import com.kyho.camera.CameraActivity; import com.kyho.gesture.ActivitySwipeDetector; import com.kyho.gesture.SwipeInterface; public class MiddleActivity extends CameraActivity implements SwipeInterface { private static final String TAG = "MainActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.d(TAG, "OnCreate!"); ActivitySwipeDetector swipe = new ActivitySwipeDetector(this); FrameLayout swipe_layout = (FrameLayout) findViewById(R.id.camera_preview); swipe_layout.setOnTouchListener(swipe); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.left, menu); return true; } @Override public void bottom2top(View v) { // TODO Auto-generated method stub } @Override public void left2right(View v) { // TODO Auto-generated method stub switch(v.getId()){ case R.id.camera_preview: Toast.makeText(this, "left to right swipe", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(this, LeftActivity.class); startActivity(intent); break; } } @Override public void right2left(View v) { // TODO Auto-generated method stub } @Override public void top2bottom(View v) { // TODO Auto-generated method stub } } ActivitySwipeDetector package com.kyho.gesture; import android.util.Log; import android.view.MotionEvent; import android.view.View; public class ActivitySwipeDetector implements View.OnTouchListener { static final String logTag = "ActivitySwipeDetector"; private SwipeInterface activity; static final int MIN_DISTANCE = 100; private float downX, downY, upX, upY; public ActivitySwipeDetector(SwipeInterface activity){ this.activity = activity; } public void onRightToLeftSwipe(View v){ Log.i(logTag, "RightToLeftSwipe!"); activity.right2left(v); } public void onLeftToRightSwipe(View v){ Log.i(logTag, "LeftToRightSwipe!"); activity.left2right(v); } public void onTopToBottomSwipe(View v){ Log.i(logTag, "onTopToBottomSwipe!"); activity.top2bottom(v); } public void onBottomToTopSwipe(View v){ Log.i(logTag, "onBottomToTopSwipe!"); activity.bottom2top(v); } public boolean onTouch(View v, MotionEvent event) { switch(event.getAction()){ case MotionEvent.ACTION_DOWN: { downX = event.getX(); downY = event.getY(); return true; } case MotionEvent.ACTION_UP: { upX = event.getX(); upY = event.getY(); float deltaX = downX - upX; float deltaY = downY - upY; // swipe horizontal? if(Math.abs(deltaX) > MIN_DISTANCE){ // left or right if(deltaX < 0) { this.onLeftToRightSwipe(v); return true; } if(deltaX > 0) { this.onRightToLeftSwipe(v); return true; } } else { Log.i(logTag, "Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE); } // swipe vertical? if(Math.abs(deltaY) > MIN_DISTANCE){ // top or down if(deltaY < 0) { this.onTopToBottomSwipe(v); return true; } if(deltaY > 0) { this.onBottomToTopSwipe(v); return true; } } else { Log.i(logTag, "Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE); v.performClick(); } } } return false; } } SwipeInterface package com.kyho.gesture; import android.view.View; public interface SwipeInterface { public void bottom2top(View v); public void left2right(View v); public void right2left(View v); public void top2bottom(View v); }

#gesture

swipe view

https://developer.android.com/training/implementing-navigation/lateral.html#horizontal-paging

#swipe view

camera app

https://github.com/rexstjohn/UltimateAndroidCameraGuide/blob/master/camera/src/main/java/com/ultimate/camera/fragments/NativeCameraFragment.java https://github.com/commonsguy/cwac-camera http://www.airpair.com/android/android-camera-development https://developer.android.com/guide/topics/media/camera.html

#camera api

tumblr api

oAuth http://www.android-ios-tutorials.com/920/tumblr-login-using-sign-post/

#kyho #tumblr #oauth

Intent Usage

start an activity

start and stop a service

send a broadcast

bind to a service

You can also filter for intent in XML (<filter>) and Java (new intentFilter).

#intent

Android concept so far (2/27/2013 chat)

(5:49:05 PM) Tony Doan: hihi

(6:18:29 PM) Steve Suh: hola

(6:18:37 PM) Tony Doan: hey hey

(6:18:45 PM) Tony Doan: i want to explain an android concepts

(6:18:48 PM) Tony Doan: to see if i understand it

(6:18:51 PM) Tony Doan: can i do that with you?

(6:20:17 PM) Steve Suh: ok

(6:20:22 PM) Tony Doan: kay

(6:20:24 PM) Tony Doan: so application

(6:20:29 PM) Tony Doan: consists of activities

(6:20:35 PM) Tony Doan: each activity

(6:20:40 PM) Tony Doan: is a screen

(6:20:44 PM) Tony Doan: like a webpage

(6:20:50 PM) Tony Doan: and the link to each other activies

(6:20:53 PM) Tony Doan: is the intent

(6:20:55 PM) Tony Doan: am i right?

(6:20:59 PM) Tony Doan: intent also

(6:21:06 PM) Tony Doan: request stuff

(6:21:09 PM) Tony Doan: such as services

(6:21:16 PM) Tony Doan: but that's all i got so far

(6:21:22 PM) Steve Suh: ya that sounds good

(6:21:24 PM) Tony Doan: mmmm

(6:21:29 PM) Tony Doan: each activity have a lifecycle?

(6:21:36 PM) Tony Doan: or does the app have a life cycle?

(6:21:45 PM) Steve Suh: each activity has a lifecycle

(6:21:49 PM) Tony Doan: and

(6:22:01 PM) Tony Doan: each app is on an instant of vm?

(6:22:04 PM) Tony Doan: instance

(6:22:11 PM) Steve Suh: each app

(6:22:17 PM) Steve Suh: has it's own dalvik vm

(6:22:19 PM) Tony Doan: ah

(6:22:24 PM) Tony Doan: YEEEEES

(6:22:24 PM) Steve Suh: and uid

(6:22:27 PM) Tony Doan: ah

(6:22:31 PM) Tony Doan: oh yeah

(6:22:32 PM) Tony Doan: uid

(6:22:33 PM) Tony Doan: cause it's

(6:22:37 PM) Tony Doan: group up

(6:22:38 PM) Tony Doan: and shit

(6:23:57 PM) Tony Doan: yeah that's all i got

(6:23:59 PM) Tony Doan: thank you

(6:24:00 PM) Tony Doan: so much

(6:24:01 PM) Tony Doan: haha

(6:27:18 PM) Steve Suh: cools

#chat

service vs intentservice

service - intervally do stuff intentservice - do it once and die (manually check an update once)

#service #intentservice

async task

Most of the time you use async task to update UI

#async

service

http://marakana.com/bookshelf/main_building_blocks_tutorial/service_overview.html

#service

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quest for android