Question

很高兴见到你。我已经看过YouTube教程和一些论坛，我正在寻找Android Studio APK的帮助。

我的apk包含在网页浏览中阅读PDF，从Android Studio安装到手机时效果非常好。但是从Play商店下载时，它不会打开任何PDF。你能帮助我吗？谢谢。

这是我的代码，在我的模拟器和我直接从Android Studio连接和安装的设备上运行时没有错误。

layout....

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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.crisdanlyt.dragonesmi17.Apu">


    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</android.support.constraint.ConstraintLayout>

********************************************
Java


public class Apu extends AppCompatActivity {

    PDFView pdfView;
    ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_viewmnal);

        PDFView pdfView = (PDFView) findViewById(R.id.pdfView);

        pdfView.fromAsset("apu.pdf").load();
    }

Answer 1

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".HomeActivity">

<com.github.barteksc.pdfviewer.PDFView
    android:id="@+id/pdfView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</LinearLayout>

这是活动

public class HomeActivity extends AppCompatActivity {
        private PDFView pdfView;

        private void initViews() {
            pdfView = (PDFView) findViewById(R.id.pdfView);
        }

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_home);
            initViews();
            setPdfView();
        }


        public void setPdfView() {
            pdfView.fromAsset("0to1.pdf")
                    //.pages(0, 2, 1, 3, 3, 3) // all pages are displayed by default
                    .enableSwipe(true) // allows to block changing pages using swipe
                    .swipeHorizontal(true)
                    .enableDoubletap(true)
                    .defaultPage(0)
                    .enableAnnotationRendering(true)
                    .enableAntialiasing(true)
                    .onDraw(new OnDrawListener() {
                        @Override
                        public void onLayerDrawn(Canvas canvas, float pageWidth, float pageHeight, int displayedPage) {
    //                        Bitmap bitmap = Bitmap.createBitmap(canvas.getWidth(), canvas.getHeight(), Bitmap.Config.ARGB_8888); //low res
    //
    //                        Paint paint = new Paint();
    //                        paint.setColor(Color.BLUE);
    //                        canvas.drawBitmap(bitmap, 0,0, paint);
                        }
                    })
                    // allows to draw something on the current page, usually visible in the middle of the screen
                    //.onDraw(onDrawListener)
                    // allows to draw something on all pages, separately for every page. Called only for visible pages
                    //.onDrawAll(onDrawListener)
                    .onLoad(new OnLoadCompleteListener() {
                        @Override
                        public void loadComplete(int nbPages) {
                            //Toast.makeText(HomeActivity.this, "Complete", Toast.LENGTH_SHORT).show();
                            Log.d("TAG", "Complete");
                        }
                    }) // called after document is loaded and starts to be rendered
                    .onPageChange(new OnPageChangeListener() {
                        @Override
                        public void onPageChanged(int page, int pageCount) {
                            Log.d("TAG", "Complete");
                        }
                    })
                    .onPageScroll(new OnPageScrollListener() {
                        @Override
                        public void onPageScrolled(int page, float positionOffset) {
                            Log.d("TAG", "onPageScrolled");
                        }
                    })
                    .onError(new OnErrorListener() {
                        @Override
                        public void onError(Throwable t) {
                            Log.d("TAG", "onError");
                        }
                    })
                    .onPageError(new OnPageErrorListener() {
                        @Override
                        public void onPageError(int page, Throwable t) {
                            Log.d("TAG", "onPageError");
                        }
                    })
                    .onRender(new OnRenderListener() {
                        @Override
                        public void onInitiallyRendered(int nbPages) {
                            Log.d("TAG", "OnRenderListener");
                        }
                    }) // called after document is rendered for the first time
                    // called on single tap, return true if handled, false to toggle scroll handle visibility
                    .onTap(new OnTapListener() {
                        @Override
                        public boolean onTap(MotionEvent e) {
                            return false;
                        }
                    })
                    .enableAnnotationRendering(true) // render annotations (such as comments, colors or forms)
                    .password(null)
                    .scrollHandle(null)
                    .enableAntialiasing(true) // improve rendering a little bit on low-res screens
                    // spacing between pages in dp. To define spacing color, set view background
                    .spacing(0)
                    //.autoSpacing(false) // add dynamic spacing to fit each page on its own on the screen
                    //.linkHandler(DefaultLinkHandler)
                    //.pageFitPolicy(FitPolicy.WIDTH)
                    // .pageSnap(true) // snap pages to screen boundaries
                    // .pageFling(false) // make a fling change only a single page like ViewPager
                    .load();
        }
    }

创建资产文件夹并将pdf放入其中

从我的Android应用中查看PDF

1 个答案: