xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:orientation="vertical">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/myImageButton"/>
</LinearLayout>
java:
import android.content.Intent;
import android.database.Cursor;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.ImageButton;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private ImageButton myImageButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myImageButton=(ImageButton)findViewById(R.id.myImageButton);
myImageButton.setOnClickListener(new ImageButton.OnClickListener()
{
@Override
public void onClick(View v)
{
Intent myInentDial=new Intent("android.intent.action.CALL_BUTTON");
startActivity(myInentDial);
}
});
}
}
1.Intent myInentDial=new Intent(“android.intent.action.CALL_BUTTON”); 显式Intent