Calling one Activity from another in Android
check the following code to call one activity from another.
Intent intent = new Intent(CurrentActivity.this, OtherActivity.class);
CurrentActivity.this.startActivity(intent);
I used following code on my sample application to start new activity.
Button next = (Button) findViewById(R.id.TEST);
next.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent myIntent = new Intent( view.getContext(), MyActivity.class);
startActivityForResult(myIntent, 0);
}
});
First question:
Use the Intent to call another Activity. In the Manifest, you should add
<activity android:name="ListViewImage"></activity>
<activity android:name="com.company.listview.ListViewImage">
</activity>
And in your current activity,
btListe = (ImageButton)findViewById(R.id.Button_Liste);
btListe.setOnClickListener(new OnClickListener()
{ public void onClick(View v)
{
intent = new Intent(main.this, ListViewImage.class);
startActivity(intent);
finish();
}
});
Second question:
sendButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String valueString = editValue.getText().toString();
long value;
if (valueString != null) {
value = Long.parseLong(valueString);
}
else {
value = 0;
}
Bundle sendBundle = new Bundle();
sendBundle.putLong("value", value);
Intent i = new Intent(Activity1.this, Activity2.class);
i.putExtras(sendBundle);
startActivity(i);
finish();
}
});
and in Activity2:
Bundle receiveBundle = this.getIntent().getExtras();
final long receiveValue = receiveBundle.getLong("value");
receiveValueEdit.setText(String.valueOf(receiveValue));
callReceiverButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(Activity2.this, Receiver.class);
i.putExtra("new value", receiveValue - 10);
}
});