activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#8cd5ff"
>
<Button
android:id="@+id/btn_do"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Request String From URL"
android:layout_margin="25dp"
android:layout_gravity="top|center_horizontal"
/>
<TextView
android:id="@+id/tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_anchor="@id/btn_do"
app:layout_anchorGravity="bottom"
android:layout_gravity="bottom|center_horizontal"
android:layout_margin="15dp"
android:textSize="18sp"
android:fontFamily="sans-serif-condensed"
/>
</android.support.design.widget.CoordinatorLayout>
MainActivity.java
package com.cfsuman.me.androidcodesnippets;
import android.app.Activity;
import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.android.volley.Cache;
import com.android.volley.Network;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.BasicNetwork;
import com.android.volley.toolbox.DiskBasedCache;
import com.android.volley.toolbox.HurlStack;
import com.android.volley.toolbox.StringRequest;
public class MainActivity extends AppCompatActivity {
private Context mContext;
private Activity mActivity;
private CoordinatorLayout mCLayout;
private Button mButtonDo;
private TextView mTextView;
private String mUrlString = "https://android--examples.blogspot.com";
private RequestQueue mRequestQueue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get the application context
mContext = getApplicationContext();
mActivity = MainActivity.this;
// Get the widget reference from XML layout
mCLayout = (CoordinatorLayout) findViewById(R.id.coordinator_layout);
mButtonDo = (Button) findViewById(R.id.btn_do);
mTextView = (TextView) findViewById(R.id.tv);
// Make the text view scrollable
mTextView.setMovementMethod(new ScrollingMovementMethod());
// Set a click listener for button widget
mButtonDo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Empty the TextView
mTextView.setText("");
// Instantiate the cache
Cache cache = new DiskBasedCache(getCacheDir(),1024*1024*5); // 5MB cache size
// Setup the network to use HttpURLConnection as the HTTP client
Network network = new BasicNetwork(new HurlStack());
// Instantiate the RequestQueue with cache and network
mRequestQueue = new RequestQueue(cache,network);
// Start the RequestQueue
mRequestQueue.start();
// Initialize a new StringRequest
StringRequest stringRequest = new StringRequest(
Request.Method.GET,
mUrlString,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
// Do something with response string
mTextView.setText(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// Do something when get error
Snackbar.make(mCLayout,"Error...",Snackbar.LENGTH_LONG).show();
}
}
);
// Add StringRequest to the RequestQueue
mRequestQueue.add(stringRequest);
}
});
}
}
build.gradle(app) dependencies
compile 'com.android.volley:volley:1.0.0'
