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Android activity switching direction

when switching between two actions, the screen slides are from right to left. When I press the back key, the screen slides are from right to left. Is this a way when I press a key from an action to change the sliding direction of the screen?

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2 answers

Danny's decision can be made to work, but it's too complicated. The key method you want to learn is overridePendingTransition ().

Here is the main activity that I mocked at its use. I made the transition vertically to show that you can do the transformations in any direction you like:

package com.superliminal.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class ScreenTransitionTest extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button btnForwards = (Button) findViewById(R.id.btnForwards);
        btnForwards.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Activity currentActivity = (Activity) v.getContext();
                Intent i = new Intent(currentActivity, NewScreen.class);
                // Tell the new activity how return when finished.
                i.putExtra("anim id in", R.anim.down_in);
                i.putExtra("anim id out", R.anim.down_out);
                currentActivity.startActivity(i);
                // This makes the new screen slide up as it fades in
                // while the current screen slides up as it fades out.
                overridePendingTransition(R.anim.up_in, R.anim.up_out);
            }
        });
    }
}

Here is a new screen implementation:

package com.superliminal.test;

import android.app.Activity;
import android.os.Bundle;

public class NewScreen extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.new_screen);
    }

    @Override
    public void onBackPressed() {
        this.finish();
        // Use exiting animations specified by the parent activity if given
        // Translate left if not specified.
        overridePendingTransition(
            getIntent().getIntExtra("anim id in", R.anim.left_in),
            getIntent().getIntExtra("anim id out", R.anim.left_out));
    }
}

, . . main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#990000" >
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Main Activity" />
    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnForwards"
        android:text="Forward" />
</LinearLayout>

new_screen.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#009900" >
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="New Screen. Use back button to return." />
</RelativeLayout>

, - XML , res/anim.

up_in.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="-100%p" android:toYDelta="0" android:duration="1000"/>
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" />
</set>

up_out.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="0" android:toYDelta="100%p" android:duration="1000"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="1000" />
</set>

down_in.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="1000"/>
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" />
</set>

down_out.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="0" android:toYDelta="-100%p" android:duration="1000"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="1000" />
</set>
+3

, . , - , , , , , . , . onCreate(), , .

"ScreenTransitionLab" "android.example" , , , , , . , .

, , :

<?xml version="1.0" encoding="utf-8"?>
 <!--
  Wrapper layout whose children are to be animated. The outermost layout
  used by an activity can never be animated, so this wrapper is needed.
  The wrapper layout is given a different color so it can be
  distinguished from the layout that is animated.
 -->
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:background="#0000FF"
>
 <!-- Actual layout that is animated. -->
 <LinearLayout
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="#FF0000"
 >
  <TextView
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello" />
  <Button
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:id="@+id/btnForwards"
   android:text="Forwards" />
 </LinearLayout>
</LinearLayout>

, , :

<?xml version="1.0" encoding="utf-8"?>
 <!--
  Wrapper layout whose children are to be animated. The outermost layout
  used by an activity can never be animated, so this wrapper is needed.
  The wrapper layout is given a different color so it can be
  distinguished from the layout that is animated.
 -->
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:background="#0000FF"
>
 <!-- Actual layout that is animated. -->
 <LinearLayout
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="#FF0000"
 >
  <TextView
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello" />
  <Button
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:id="@+id/btnForwards"
   android:text="Forwards" />
 </LinearLayout>
</LinearLayout>

ScreenTransitionsLab, , "" NewScreen:

package android.example;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class ScreenTransitionLab extends Activity {
    // Layout fields
    protected LinearLayout mainLayout;
    public static Button btnForwards = null;
    public static Activity currentActivity;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        currentActivity = this;

        /*
         * This creates View objects from the xml file. The xml file should
         * define all views and all static attributes.
         */
        mainLayout = (LinearLayout) getLayoutInflater().inflate(R.layout.main,
                null);

        btnForwards = (Button) mainLayout.findViewById(R.id.btnForwards);
        btnForwards.setOnClickListener(forwardsOnClickListener);

        UIHelper.setSlideDirection(mainLayout, UIHelper.bottom);

        /*
         * Use the Layout that contains the View objects that were modified to
         * create screen that will be shown after activity is done processing
         * instead of the xml file. The Layout will contain all of the views and
         * static attributes that were defined in the xml file plus all of the
         * dynamic attributes that were defined in the code above.
         */
        setContentView(mainLayout);
    }

    public View.OnClickListener forwardsOnClickListener = new View.OnClickListener() {
        public void onClick(View v) {
            Activity currentActivity = (Activity) v.getContext();
            Intent i = new Intent(currentActivity, NewScreen.class);
            currentActivity.startActivity(i);

            /*
             * Remove activity that is no longer current from the activity stack
             * to prevent the application from bloating.
             */
            currentActivity.finish();
        }
    };

}

NewScreen, , "" ScreenTransitionsLab:

package android.example;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class NewScreen extends Activity {
    protected LinearLayout mainLayout;
    public static Button btnBackwards = null;
    public static Activity currentActivity;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        currentActivity = this;

        /*
         * This creates View objects from the xml file. The xml file should
         * define all views and all static attributes.
         */
        mainLayout = (LinearLayout) getLayoutInflater().inflate(
                R.layout.new_screen, null);

        btnBackwards = (Button) mainLayout.findViewById(R.id.btnBackwards);
        btnBackwards.setOnClickListener(backwardsOnClickListener);

        UIHelper.setSlideDirection(mainLayout, UIHelper.top);

        /*
         * Use the Layout that contains the View objects that were modified to
         * create screen that will be shown after activity is done processing
         * instead of the xml file. The Layout will contain all of the views and
         * static attributes that were defined in the xml file plus all of the
         * dynamic attributes that were defined in the code above.
         */
        setContentView(mainLayout);
    }

    public View.OnClickListener backwardsOnClickListener = new View.OnClickListener() {
        public void onClick(View v) {
            Activity currentActivity = (Activity) v.getContext();
            Intent i = new Intent(currentActivity, ScreenTransitionLab.class);
            currentActivity.startActivity(i);

            /*
             * Remove activity that is no longer current from the activity stack
             * to prevent the application from bloating.
             */
            currentActivity.finish();
        }
    };

}

UIHelper, :

package android.example;

import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.LayoutAnimationController;
import android.view.animation.TranslateAnimation;

public class UIHelper {
    public static final int top = 1;
    public static final int bottom = 2;
    public static final int left = 3;
    public static final int right = 4;

    /**
     * Set direction that children in the panel will slide in from when next
     * displayed.
     * 
     * @param panel
     *            {@link ViewGroup} whose children will be slid in from the
     *            specified direction when the panel is next displayed.
     * @param fromDirection
     *            Primitive int indicating the direction to slide the children
     *            of the panel from.
     */
    public static void setSlideDirection(ViewGroup panel, int fromDirection) {
        float fromX = 0;
        float toX = 0;
        float fromY = 0;
        float toY = 0;

        AnimationSet set = new AnimationSet(true);

        Animation animation = new AlphaAnimation(0.0f, 1.0f);
        animation.setDuration(100);
        set.addAnimation(animation);

        switch (fromDirection) {
        case top:
            fromX = 0.00f;
            toX = 0.00f;
            fromY = -1.00f;
            toY = 0.00f;
            break;
        case bottom:
            fromX = 0.00f;
            toX = 0.00f;
            fromY = 1.00f;
            toY = 0.00f;
            break;
        case left:
            fromX = -1.00f;
            toX = 0.00f;
            fromY = 0.00f;
            toY = 0.00f;
            break;
        default:
            fromX = 1.00f;
            toX = 0.00f;
            fromY = 0.00f;
            toY = 0.00f;
            break;
        }

        animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, fromX,
                Animation.RELATIVE_TO_SELF, toX, Animation.RELATIVE_TO_SELF,
                fromY, Animation.RELATIVE_TO_SELF, toY);
        animation.setDuration(200);
        set.addAnimation(animation);

        LayoutAnimationController controller = new LayoutAnimationController(
                set, 0.25f);
        panel.setLayoutAnimation(controller);

    }

}
+5

Source: https://habr.com/ru/post/1794436/

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