如何分配每个按钮以从资产文件夹打开pdf文件

Question

Hi there please my goal is to create an application with five buttons to open five book pdf by each one of them open an different activity .

MainActivity class :

public void onClick(View v) {
    switch (v.getId())
    {
        case R.id.btn1:
            x=1;
                Intent i = new Intent(MainActivity.this, Pdf_Activity.class);
                startActivity(i);
            break;
        case R.id.btn2:
            x=2;
            Intent i2=new Intent(MainActivity.this,Pdf_Activity.class);
            startActivity(i2);
            break;
        case R.id.btn3:
            x=3;
            Intent i3=new Intent(MainActivity.this,Pdf_Activity.class);
            startActivity(i3);
            break;
        case R.id.btn4:
            x=4;
            Intent i4=new Intent(MainActivity.this,Pdf_Activity.class);
            startActivity(i4);
            break;
        case R.id.btn5:
            x=5;
            Intent i5=new Intent(MainActivity.this,Pdf_Activity.class);
            startActivity(i5);
            break;
            default:
                break;
    }

I want to open a pdf file within buttons and this is "pdf_Activity" :

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.content_pdf);
   switch (main.x)
   {
       case (1):
           pdf1=(PDFView) findViewById(R.id.pdf1);
           pdf1.fromAsset("insani.pdf").load();
           break;
       case (2):
           pdf2=(PDFView) findViewById(R.id.pdf2);
           pdf2.fromAsset("kawniya.pdf").load();
           break;
       case (3):
           pdf3=(PDFView) findViewById(R.id.pdf3);
           pdf3.fromAsset("3ilm.pdf").load();
           break;
       case (4):
           pdf4=(PDFView) findViewById(R.id.pdf4);
           pdf4.fromAsset("9iyam.pdf").load();
           break;
       case (5):
           pdf5=(PDFView) findViewById(R.id.pdf5);
           pdf5.fromAsset("a5la9.pdf").load();
           break;
           default:
               break;
   }

I think there are some problems in these two code . please help

Answer 1

I would change the switch in the onClick to :

Intent i = new Intent(MainActivity.this, Pdf_Activity.class);
switch (v.getId())
{
    case R.id.btn1:
        i.putExtra("file",1);
            startActivity(i);
        break;
    case R.id.btn2:
        i.putExtra("file",2);
        startActivity(i);
        break;
    case R.id.btn3:
        i.putExtra("file",3);
        startActivity(i);
        break;
    case R.id.btn4:
        i.putExtra("file",4);
        startActivity(i);
        break;
    case R.id.btn5:
        i.putExtra("file",5);
        startActivity(i);
        break;
        default:
            break;
}

Then in the pdf_activity Use it like so:

Bundle bundle = getIntent().getExtras();
int x = bundle.getInt("file");

switch (x)
{
...
}

Answer 2

I think the problem is in the XML file of pdf files

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
<com.github.barteksc.pdfviewer.PDFView
            android:id="@+id/pdf1"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
<com.github.barteksc.pdfviewer.PDFView
            android:id="@+id/pdf2"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
<com.github.barteksc.pdfviewer.PDFView
            android:id="@+id/pdf3"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
.......................
....................
</LinearLayout>

</LinearLayout>