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Android實(shí)現(xiàn)畫中畫功能(圖片)

 更新時(shí)間:2021年09月10日 11:40:38   作者:tracydragonlxy  
畫中畫是一種特殊類型的多窗口模式,最常用于視頻播放。這篇文章主要介紹了Android實(shí)現(xiàn)畫中畫功能,文中示例代碼介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下

簡(jiǎn)介: Android 8.0(API 級(jí)別 26)允許以畫中畫 (PIP) 模式啟動(dòng) Activity。畫中畫是一種特殊類型的多窗口模式,最常用于視頻播放。使用該模式,用戶可以通過固定到屏幕一角的小窗口觀看視頻,同時(shí)在應(yīng)用之間進(jìn)行導(dǎo)航或?yàn)g覽主屏幕上的內(nèi)容。

畫中畫窗口會(huì)顯示在屏幕的最上層,位于系統(tǒng)選擇的一角。您可以將畫中畫窗口拖動(dòng)到其他位置(會(huì)自動(dòng)貼邊)。當(dāng)您點(diǎn)按該窗口時(shí),會(huì)看到兩個(gè)特殊的控件:全屏切換開關(guān)(位于窗口的中心)和關(guān)閉按鈕(右上角的“X”)。

效果圖:

1、聲明對(duì)畫中畫的支持:

默認(rèn)情況下,系統(tǒng)不會(huì)自動(dòng)為應(yīng)用提供畫中畫支持。如果您想在應(yīng)用中支持畫中畫,可以通過將 android:supportsPictureInPicture 設(shè)置為 true,在清單中注冊(cè)視頻 Activity。此外,指定您的 Activity 處理布局配置更改,這樣一來(lái),在畫中畫模式轉(zhuǎn)換期間發(fā)生布局更改時(shí),您的 Activity 就不會(huì)重新啟動(dòng)。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.csu.pictureinpicture">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">
        <activity
            android:name=".TestPipActivity"
            android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"
            android:resizeableActivity="true"
            android:supportsPictureInPicture="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

</manifest>

2、將 Activity 切換到畫中畫模式:

如要進(jìn)入畫中畫模式,Activity 必須調(diào)用enterPictureInPictureMode() 。

ivPip.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        int ivWidth = imageViewPip.getWidth();
        int ivHeight = imageViewPip.getHeight();
        if (ivWidth != 0 && ivHeight != 0) {
            // 設(shè)置寬高比例值,第一個(gè)參數(shù)表示分子,第二個(gè)參數(shù)表示分母
            // 10/5=2,表示畫中畫窗口的寬度是高度的兩倍
            Rational rational = new Rational(ivWidth, ivHeight);
            mBuilder.setAspectRatio(rational).build();
        }
        enterPictureInPictureMode(mBuilder.build());
    }
});

3、處理畫中畫模式下的界面元素

當(dāng) Activity 進(jìn)入或退出畫中畫模式時(shí),系統(tǒng)會(huì)調(diào)用 Activity.onPictureInPictureModeChanged() Fragment.onPictureInPictureModeChanged() 。在畫中畫模式下,Activity 會(huì)在一個(gè)小窗口中顯示。在畫中畫模式下,用戶無(wú)法與界面元素互動(dòng),并且可能很難看清小界面元素的詳細(xì)信息。在 Activity 進(jìn)入畫中畫模式之前移除其他界面元素,并在 Activity 再次變?yōu)槿習(xí)r恢復(fù)這些元素:

@Override
public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode, Configuration newConfig) {
    super.onPictureInPictureModeChanged(isInPictureInPictureMode, newConfig);
    Log.i(TAG, "onPictureInPictureModeChanged: " + isInPictureInPictureMode);
    if (isInPictureInPictureMode) {
        // hide some ui
        tvTitle.setVisibility(View.INVISIBLE);
        tvDetail.setVisibility(View.INVISIBLE);
        tvInfo.setVisibility(View.INVISIBLE);
        ivPip.setVisibility(View.INVISIBLE);
        imageView.setVisibility(View.INVISIBLE);
        imageViewPip.setVisibility(View.VISIBLE);
    } else {
        // Restore the full-screen UI
        tvTitle.setVisibility(View.VISIBLE);
        tvDetail.setVisibility(View.VISIBLE);
        tvInfo.setVisibility(View.VISIBLE);
        ivPip.setVisibility(View.VISIBLE);
        imageView.setVisibility(View.VISIBLE);
        imageViewPip.setVisibility(View.INVISIBLE);
    }
}

完整代碼:

頁(yè)面布局文件:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.csu.pictureinpicture.TestPipActivity">

    <ImageView
        android:id="@+id/image_view_pip"
        android:layout_width="300dp"
        android:layout_height="200dp"
        android:src="@mipmap/image"
        android:scaleType="centerCrop"
        android:visibility="invisible"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"/>

    <TextView
        android:id="@+id/tv_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="圖片畫中畫演示"
        android:textSize="24sp"
        android:textColor="#353535"
        android:layout_marginTop="50dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

    <ImageView
        android:id="@+id/image_view"
        android:layout_width="0dp"
        android:layout_height="300dp"
        android:src="@mipmap/image"
        android:scaleType="centerCrop"
        android:layout_marginTop="60dp"
        app:layout_constraintTop_toBottomOf="@id/tv_title"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

    <ImageView
        android:id="@+id/iv_pip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/pip"
        android:layout_marginEnd="10dp"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="@id/image_view"
        app:layout_constraintBottom_toBottomOf="@id/image_view"/>

    <TextView
        android:id="@+id/tv_detail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="detail"
        android:textSize="14sp"
        android:lineSpacingMultiplier="1.5"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@id/image_view"/>

    <TextView
        android:id="@+id/tv_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SDK Version"
        android:layout_marginBottom="10dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Activity文件:

import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.constraintlayout.widget.Constraints;

import android.app.PictureInPictureParams;
import android.content.res.Configuration;
import android.os.Bundle;
import android.os.Build;
import android.util.Log;
import android.util.Rational;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class TestPipActivity extends AppCompatActivity {
 
    private static final String TAG = "TestPipActivity";

    private TextView tvTitle, tvInfo, tvDetail;
    private ImageView imageView, imageViewPip, ivPip;

    private PictureInPictureParams.Builder mBuilder;

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

        setContentView(R.layout.activity_test_pip);

        tvTitle = findViewById(R.id.tv_title);
        tvDetail = findViewById(R.id.tv_detail);
        tvInfo = findViewById(R.id.tv_info);
        imageView = findViewById(R.id.image_view);
        ivPip = findViewById(R.id.iv_pip);
        imageViewPip = findViewById(R.id.image_view_pip);

        tvDetail.setText("Name: kobe.png\r\nSize: 75.7KB(480px * 300px)\r\nDate: 2020/09/17 15:40");

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
          && getPackageManager().hasSystemFeature(PackageManager.FEATURE_PICTURE_IN_PICTURE)) {
            mBuilder = new PictureInPictureParams.Builder();

            ivPip.setVisibility(View.VISIBLE);
            tvInfo.setText("SDK Version:" + Build.VERSION.SDK_INT + "(支持畫中畫模式)");

        } else {
            ivPip.setVisibility(View.INVISIBLE);
            tvInfo.setText("SDK Version:" + Build.VERSION.SDK_INT + "(不支持畫中畫模式)");
        }

        ivPip.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int ivWidth = imageViewPip.getWidth();
                int ivHeight = imageViewPip.getHeight();
                if (ivWidth != 0 && ivHeight != 0) {
                    // 設(shè)置寬高比例值,第一個(gè)參數(shù)表示分子,第二個(gè)參數(shù)表示分母
                    // 10/5=2,表示畫中畫窗口的寬度是高度的兩倍
                    Rational rational = new Rational(ivWidth, ivHeight);
                    mBuilder.setAspectRatio(rational).build();
                }
                enterPictureInPictureMode(mBuilder.build());
            }
        });
    }

    @Override
    public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode, Configuration newConfig) {
        super.onPictureInPictureModeChanged(isInPictureInPictureMode, newConfig);
        Log.i(TAG, "onPictureInPictureModeChanged: " + isInPictureInPictureMode);
        if (isInPictureInPictureMode) {
            // hide some ui
            tvTitle.setVisibility(View.INVISIBLE);
            tvDetail.setVisibility(View.INVISIBLE);
            tvInfo.setVisibility(View.INVISIBLE);
            ivPip.setVisibility(View.INVISIBLE);
            imageView.setVisibility(View.INVISIBLE);
            imageViewPip.setVisibility(View.VISIBLE);
        } else {
            // Restore the full-screen UI
            tvTitle.setVisibility(View.VISIBLE);
            tvDetail.setVisibility(View.VISIBLE);
            tvInfo.setVisibility(View.VISIBLE);
            ivPip.setVisibility(View.VISIBLE);
            imageView.setVisibility(View.VISIBLE);
            imageViewPip.setVisibility(View.INVISIBLE);
        }
    }
}

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