Android Open Source - memBitmapTest Base Memory Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.membmptest;
/*  www. ja v  a 2 s .c o  m*/
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public abstract class BaseMemoryActivity extends Activity {

  private ArrayList<WeakReference<Drawable>> weakDrawables;

  protected abstract Class<?> getNewClass();

  protected abstract ArrayList<Integer> getImageResourceIds();

  // Static final variables.
  public static final String EXTRA_SET_DRAWABLES_AFTER = "EXTRA_SET_DRAWABLES_AFTER";
  private static final String EXTRA_INDEX = "INDEX";

  // Object declarations.
  protected int currentActvityIndex = 0;
  protected boolean setDrawablesAfter = true;

  @Override
  public void onDetachedFromWindow() {
    unbindDrawables(getWindow().getDecorView());
    super.onDetachedFromWindow();
  }

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    TestLog.recLifeCycle(this);
    Bundle b = getIntent().getExtras();
    if (b != null) {
      currentActvityIndex = b.getInt(EXTRA_INDEX, currentActvityIndex);
      setDrawablesAfter = b.getBoolean(EXTRA_SET_DRAWABLES_AFTER,
          setDrawablesAfter);
    }
    if (setDrawablesAfter) {
      setContentView(R.layout.activity_main_without_drawables);
    }
  }

  @SuppressLint("NewApi")
  @Override
  protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);

    TextView tvMainActivityCount = (TextView) findViewById(R.id.tvMainActivityCount);
    tvMainActivityCount.setText(getString(R.string.activtyIndexStr) + " : "
        + currentActvityIndex);

    Button btnSameActivity = (Button) findViewById(R.id.btnSameActivity);
    Button btnNewActivity = (Button) findViewById(R.id.btnNewActivity);
    final CheckBox chkStartAfterFinish = (CheckBox) findViewById(R.id.chkStartAfterFinish);
    final CheckBox chkLoadResourceAfterCreate = (CheckBox) findViewById(R.id.chkLoadResourceAfterCreate);
    chkLoadResourceAfterCreate.setChecked(setDrawablesAfter);
    btnSameActivity.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        start(chkStartAfterFinish.isChecked(), false,
            chkLoadResourceAfterCreate.isChecked());
      }
    });
    btnNewActivity.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        start(chkStartAfterFinish.isChecked(), true,
            chkLoadResourceAfterCreate.isChecked());
      }
    });
    try {
      if (setDrawablesAfter) {
        boolean useResourcesClass = true;
        ArrayList<Integer> ids = getImageResourceIds();

        if (!useResourcesClass) {
          ArrayList<Bitmap> bmps = new ArrayList<Bitmap>();
          bmps.add(BitmapFactory.decodeResource(getResources(),
              ids.get(0)));

          bmps.add(BitmapFactory.decodeResource(getResources(),
              ids.get(1)));

          BitmapDrawable bmdrawable2 = new BitmapDrawable(
              getResources(), bmps.get(1));
          BitmapDrawable bmdrawable1 = new BitmapDrawable(
              getResources(), bmps.get(0));
          findViewById(R.id.llWithoutBackground2).setBackground(
              bmdrawable2);
          findViewById(R.id.llWithoutBackground1).setBackground(
              bmdrawable1);
        } else {
          weakDrawables = new ArrayList<WeakReference<Drawable>>();
          Drawable dr1 = getResources().getDrawable(ids.get(0));
          Drawable dr2 = getResources().getDrawable(ids.get(1));
          DisplayMetrics metrics = new DisplayMetrics();
          getWindowManager().getDefaultDisplay().getMetrics(metrics);

          // Drawable dr1 =
          // getResources().getDrawableForDensity(ids.get(0),
          // metrics.densityDpi);
          // Drawable dr2 =
          // getResources().getDrawableForDensity(ids.get(1),
          // metrics.densityDpi);

          // Drawable dr1 =
          // getResources().getDrawableForDensity(ids.get(0),
          // DisplayMetrics.DENSITY_LOW);
          // Drawable dr2 =
          // getResources().getDrawableForDensity(ids.get(1),
          // DisplayMetrics.DENSITY_LOW);

          weakDrawables.add(new WeakReference<Drawable>(dr1));
          weakDrawables.add(new WeakReference<Drawable>(dr2));

          findViewById(R.id.llWithoutBackground1).setBackground(
              weakDrawables.get(0).get());
          findViewById(R.id.llWithoutBackground2).setBackground(
              weakDrawables.get(1).get());
        }

      }
    } catch (Exception ex) {
      TestLog.exceptionLog(ex);
    }
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    TestLog.recLifeCycle(this);
    try {
      unbindDrawables(getWindow().getDecorView());
    } catch (Exception ex) {
      TestLog.exceptionLog(ex);
    }

    if (weakDrawables != null) {
      weakDrawables.clear();
    }
  }

  /**
   * 
   * All {@link View} and {@link ViewGroup} backgrounds are removed..
   * Neccessary for memory management.. Should be called when fragment is
   * removed..
   * 
   * @param view
   */
  private void unbindDrawables(View view) {
    if (view.getBackground() != null) {
      view.getBackground().setCallback(null);
    }
    if (view instanceof ViewGroup && !(view instanceof AdapterView)) {
      for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
        unbindDrawables(((ViewGroup) view).getChildAt(i));
      }
      ((ViewGroup) view).removeAllViews();
    }

  }

  private void start(boolean callFinish, boolean startNewTypeClass,
      boolean loadAfterCreate) {
    Intent i;
    if (startNewTypeClass) {
      i = new Intent(this, getNewClass());
    } else {
      i = new Intent(this, this.getClass());
    }
    int newIndex = currentActvityIndex + 1;
    i.putExtra(EXTRA_INDEX, newIndex);
    i.putExtra(EXTRA_SET_DRAWABLES_AFTER, loadAfterCreate);
    try {
      if (callFinish) {
        finish();
      }
      startActivity(i);
    } catch (Exception ex) {
      Toast.makeText(this, "Error on activity creation",
          Toast.LENGTH_SHORT).show();
    }
  }
}

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