Android Open Source - Android.MovingToolbar Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.iamnbty.movingtoolbar;
/* w ww . j a  v a 2  s . c  o m*/
import android.os.Build;
import android.os.Bundle;
import android.support.v4.view.ViewCompat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity implements NotifyScrollView.Callback {

    private NotifyScrollView mNotifyScrollView;

    private FrameLayout mImageFrameLayout;
    private ImageView mImageView;

    private LinearLayout mContentLinearLayout;

    private LinearLayout mToolbarLinearLayout;
    private Toolbar mToolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // set content view
        setContentView(R.layout.activity_main);

        // view matching
        mNotifyScrollView = (NotifyScrollView) findViewById(R.id.notify_scroll_view);

        mImageFrameLayout = (FrameLayout) findViewById(R.id.image_frame_layout);
        mImageView = (ImageView) findViewById(R.id.image_view);

        mContentLinearLayout = (LinearLayout) findViewById(R.id.content_linear_layout);

        mToolbarLinearLayout = (LinearLayout) findViewById(R.id.toolbar_linear_layout);
        mToolbar = (Toolbar) findViewById(R.id.toolbar);

        // more setup
        setupNotifyScrollView();
        setupToolbar();
    }

    private void setupNotifyScrollView() {
        mNotifyScrollView.setCallback(this);

        ViewTreeObserver viewTreeObserver = mNotifyScrollView.getViewTreeObserver();
        if (viewTreeObserver.isAlive()) {
            viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    // get size
                    int toolbarLinearLayoutHeight = mToolbarLinearLayout.getHeight();
                    int imageHeight = mImageView.getHeight();

                    // adjust image frame layout height
                    ViewGroup.LayoutParams layoutParams = mImageFrameLayout.getLayoutParams();
                    if (layoutParams.height != imageHeight) {
                        layoutParams.height = imageHeight;
                        mImageFrameLayout.setLayoutParams(layoutParams);
                    }

                    // adjust top margin of content linear layout
                    ViewGroup.MarginLayoutParams marginLayoutParams = (ViewGroup.MarginLayoutParams) mContentLinearLayout.getLayoutParams();
                    if (marginLayoutParams.topMargin != toolbarLinearLayoutHeight + imageHeight) {
                        marginLayoutParams.topMargin = toolbarLinearLayoutHeight + imageHeight;
                        mContentLinearLayout.setLayoutParams(marginLayoutParams);
                    }

                    // call onScrollChange to update initial properties.
                    onScrollChanged(0, 0, 0, 0);
                }
            });
        }
    }

    private void setupToolbar() {
        // set ActionBar as Toolbar
        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });
    }

    @Override
    public void onScrollChanged(int left, int top, int oldLeft, int oldTop) {
        // get scroll y
        int scrollY = mNotifyScrollView.getScrollY();

        // calculate new y (for toolbar translation)
        float newY = Math.max(mImageView.getHeight(), scrollY);

        // translate toolbar linear layout and image frame layout
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            mToolbarLinearLayout.setTranslationY(newY);
            mImageFrameLayout.setTranslationY(scrollY * 0.5f);
        } else {
            ViewCompat.setTranslationY(mToolbarLinearLayout, newY);
            ViewCompat.setTranslationY(mImageFrameLayout, scrollY * 0.5f);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_settings:
                Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show();
                return true;

            default:
                return super.onOptionsItemSelected(item);
        }
    }

}

Java Source Code List

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