我正在使用MuPDF库在我的应用中显示pdf .. 可以查看保存在内部或外部存储器中的PDF,但如果它们存储在应用程序的资源文件夹中,则应用程序不显示pdf ... 如何在应用PDF中查看?
我见过这样的解决方案,说我们可以在app相关文件夹中复制我们的应用PDF文件,然后再使用它们...... 但是我无法理解......
这是代码 -
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button showPDFBtn = (Button)findViewById(R.id.btn_show_pdf);
showPDFBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Uri uri = Uri.parse("file:///android_asset/test.pdf");
Intent intent = new Intent(MainActivity.this, MuPDFActivity.class);
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);
}}
);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
答案 0 :(得分:5)
尝试以下代码
private void readAssetAndMakeCopy()
{
AssetManager assetManager = getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(getFilesDir(), "git.pdf");
try
{
in = assetManager.open("git.pdf");
out = openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e)
{
Log.e("tag", e.getMessage());
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.parse("file://" + getFilesDir() + "/git.pdf"),
"application/pdf");
startActivity(intent);
}
private void copyFile(InputStream in, OutputStream out) throws IOException
{
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1)
{
out.write(buffer, 0, read);
}
}
确保包含
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
清单中的