Android源码之陌陌源码

public class WelcomeActivity extends BaseActivity implements OnClickListener { 
  
    private LinearLayout mLinearCtrlbar; 
    private LinearLayout mLinearAvatars; 
    private Button mBtnRegister; 
    private Button mBtnLogin; 
    private ImageButton mIbtnAbout; 
  
    private View[] mMemberBlocks; 
    private String[] mAvatars = new String[] { "welcome_0", "welcome_1", 
            "welcome_2", "welcome_3", "welcome_4", "welcome_5" }; 
    private String[] mDistances = new String[] { "0.84km", "1.02km", "1.34km", 
            "1.88km", "2.50km", "2.78km" }; 
  
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        // TODO Auto-generated method stub 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_welcome); 
        initViews(); 
        initEvents(); 
        initAvatarsItem(); 
        showWelcomeAnimation(); 
    } 
  
    @Override 
    protected void initViews() { 
        mLinearCtrlbar = (LinearLayout) findViewById(R.id.welcome_linear_ctrlbar); 
        mLinearAvatars = (LinearLayout) findViewById(R.id.welcome_linear_avatars); 
        mBtnRegister = (Button) findViewById(R.id.welcome_btn_register); 
        mBtnLogin = (Button) findViewById(R.id.welcome_btn_login); 
        mIbtnAbout = (ImageButton) findViewById(R.id.welcome_ibtn_about); 
    } 
  
    @Override 
    protected void initEvents() { 
        mBtnRegister.setOnClickListener(this); 
        mBtnLogin.setOnClickListener(this); 
        mIbtnAbout.setOnClickListener(this); 
    } 
  
    private void initAvatarsItem() { 
        initMemberBlocks(); 
        for (int i = 0; i < mMemberBlocks.length; i++) { 
            ((ImageView) mMemberBlocks[i] 
                    .findViewById(R.id.welcome_item_iv_avatar)) 
                    .setImageBitmap(mApplication.getAvatar(mAvatars[i])); 
            ((HandyTextView) mMemberBlocks[i] 
                    .findViewById(R.id.welcome_item_htv_distance)) 
                    .setText(mDistances[i]); 
        } 
    } 
  
    private void initMemberBlocks() { 
        mMemberBlocks = new View[6]; 
        mMemberBlocks[0] = findViewById(R.id.welcome_include_member_avatar_block0); 
        mMemberBlocks[1] = findViewById(R.id.welcome_include_member_avatar_block1); 
        mMemberBlocks[2] = findViewById(R.id.welcome_include_member_avatar_block2); 
        mMemberBlocks[3] = findViewById(R.id.welcome_include_member_avatar_block3); 
        mMemberBlocks[4] = findViewById(R.id.welcome_include_member_avatar_block4); 
        mMemberBlocks[5] = findViewById(R.id.welcome_include_member_avatar_block5); 
  
        int margin = (int) TypedValue.applyDimension( 
                TypedValue.COMPLEX_UNIT_DIP, 4, getResources() 
                        .getDisplayMetrics()); 
        int widthAndHeight = (mScreenWidth - margin * 12) / 6; 
        for (int i = 0; i < mMemberBlocks.length; i++) { 
            ViewGroup.LayoutParams params = mMemberBlocks[i].findViewById( 
                    R.id.welcome_item_iv_avatar).getLayoutParams(); 
            params.width = widthAndHeight; 
            params.height = widthAndHeight; 
            mMemberBlocks[i].findViewById(R.id.welcome_item_iv_avatar) 
                    .setLayoutParams(params); 
        } 
        mLinearAvatars.invalidate(); 
    } 
  
    private void showWelcomeAnimation() { 
        Animation animation = AnimationUtils.loadAnimation( 
                WelcomeActivity.this, R.anim.welcome_ctrlbar_slideup); 
        animation.setAnimationListener(new AnimationListener() { 
  
            @Override 
            public void onAnimationStart(Animation animation) { 
                mLinearAvatars.setVisibility(View.GONE); 
            } 
  
            @Override 
            public void onAnimationRepeat(Animation animation) { 
  
            } 
  
            @Override 
            public void onAnimationEnd(Animation animation) { 
                new Handler().postDelayed(new Runnable() { 
  
                    @Override 
                    public void run() { 
                        mLinearAvatars.setVisibility(View.VISIBLE); 
                    } 
                }, 800); 
            } 
        }); 
        mLinearCtrlbar.startAnimation(animation); 
    } 
  
    @Override 
    public void onClick(View v) { 
        switch (v.getId()) { 
  
        case R.id.welcome_btn_register: 
            startActivity(RegisterActivity.class); 
            break; 
  
        case R.id.welcome_btn_login: 
            startActivity(LoginActivity.class); 
            break; 
  
        case R.id.welcome_ibtn_about: 
            startActivity(AboutTabsActivity.class); 
            break; 
        } 
    } 
} 
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