package com.bigfat.timedemo; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.TimeZone; public class MainActivity extends AppCompatActivity { public static final String TAG = MainActivity.class.getSimpleName(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); // 北京时间 2015-11-05 10:30:42 Date date = new Date(1446690642456L); // GMT +8 String dateStr = "2015-11-05 10:30:42"; Log.i(TAG, date.toString()); //转换为GMT+8 SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss", Locale.CHINA); simpleDateFormat.setTimeZone(TimeZone.getTimeZone("GMT+8")); Log.i(TAG, simpleDateFormat.format(date)); //转换为当地时间 try { Log.i(TAG, simpleDateFormat.parse(dateStr).toString()); } catch (ParseException e) { e.printStackTrace(); } //格式化当地时间 SimpleDateFormat simpleDateFormat2 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss", Locale.CHINA); try { Log.i(TAG, simpleDateFormat2.format(simpleDateFormat.parse(dateStr))); } catch (ParseException e) { e.printStackTrace(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }