how to insert image from phone in android studio code example

Example 1: how to write sensor data into file android studio

public class Main extends Activity implements SensorEventListener {

private SensorManager mSensorManager;
private Sensor mAccelerometer;
private FileWriter writer;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activiy_main);
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
}

public void onStartClick(View view) {
    mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}

public void onStopClick(View view) {
    mSensorManager.unregisterListener(this);
}
protected void onResume() {
    super.onResume();
    writer = new FileWriter("myfile.txt",true);
}

protected void onPause() {
    super.onPause();

    if(writer != null) {
       writer.close();
    }
}

@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

@Override
public void onSensorChanged(SensorEvent event) {

    float x = event.values[0];
    float y = event.values[1];
    float z = event.values[2];
    writer.write(x+","+y+","+z+"\n");

 }
}

Example 2: select photo from camera android

private void pickFromGallery(){
       //Create an Intent with action as ACTION_PICK
       Intent intent=new Intent(Intent.ACTION_PICK);
       // Sets the type as image/*. This ensures only components of type image are selected
       intent.setType("image/*");
       //We pass an extra array with the accepted mime types. This will ensure only components with these MIME types as targeted.
       String[] mimeTypes = {"image/jpeg", "image/png"};
       intent.putExtra(Intent.EXTRA_MIME_TYPES,mimeTypes);
       // Launching the Intent 
       startActivityForResult(intent,GALLERY_REQUEST_CODE);
   }

    public void onActivityResult(int requestCode,int resultCode,Intent data){
          // Result code is RESULT_OK only if the user selects an Image
          if (resultCode == Activity.RESULT_OK)
          switch (requestCode){
              case GALLERY_REQUEST_CODE:
                  //data.getData returns the content URI for the selected Image
                  Uri selectedImage = data.getData();
                  imageView.setImageURI(selectedImage);
                  break;
          }
      }