我想知道我的代码是否可以在Android手机（HTC Desire）中使用现有的PDF查看器查看特定的pdf文件。如果我想从本地文件夹打开pdf文件..我该怎么办？
public class ghcm_Submenu1 extends Activity {
private ListView lv1;
private String lv_arr[]= {"item1", "item2"};
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.submenu);
lv1=(ListView)findViewById(R.id.ListView01);
// By using setAdpater method in listview we an add string array in list.
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
lv1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parentView, View childView, int position, long id) {
if ((position)== 0){
Intent intent = new Intent();
File file = new File("/sdcard/item1.pdf");
if (file.exists()) {
Uri path = Uri.fromFile(file);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(intent);
}
catch (ActivityNotFoundException e) {
Toast.makeText(ghcm_Submenu1.this,
"No Application Available to View PDF",
Toast.LENGTH_SHORT).show();
}
}
}
else if ((position)== 1){
Intent intent = new Intent();
File file = new File("/sdcard/item2.pdf");
if (file.exists()) {
Uri path = Uri.fromFile(file);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(intent);
}
catch (ActivityNotFoundException e) {
Toast.makeText(ghcm_Submenu1.this,
"No Application Available to View PDF",
Toast.LENGTH_SHORT).show();
}
}
}
}
public void onNothingSelected(AdapterView parentView) {
}
});
}
}