返回系统Home桌面

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        findViewById(R.id.start_intent).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent();                intent.setAction(Intent.ACTION_MAIN);                intent.addCategory(Intent.CATEGORY_HOME);                startActivity(intent);            }        });    }}

运行上面程序，点击按钮即可返回Home桌面。