《Android开发》——1.Activity之间的参数传递

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Activity 之间的参数传递

在两个Activity之间，可以通过Intent进行参数传递，同时，Intent可以结合包数据Bundle进行打包传输。

Intent

MainActivity.java

@Overrideprotected void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    findViewById(R.id.btnStart).setOnClickListener(new View.OnClickListener(){        @Override        public void onClick(View v){            Intent intent=new Intent(MainActivity.this,AnotherActivity.class);            intent.putExtra("parameter","start new activity");            startActivity(intent);        }    });}

AnotherActivity.java

@Overrideprotected void onCreate(Bundle savedInstanceState){    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_another);    textView=(TextView)findViewById(R.id.textView);    Intent intent=getIntent();    textView.setText(intent.getStringExtra("parameter"));}

Bundle

1、使用Intent.putExtras与Bundle

MainActivity.java

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        findViewById(R.id.btnStart).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(MainActivity.this,AnotherActivity.class);//              intent.putExtra("parameter","start new activity");                Bundle bundle = new Bundle();                bundle.putString("parameter","get bundle data");                bundle.putInt("age",56);                bundle.putString("name1","wgt");                intent.putExtras(bundle);                startActivity(intent);            }        });    }

AnotherActivity.java

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_another);    textView = (TextView) findViewById(R.id.textView);    Intent intent = getIntent();    Bundle bundle = intent.getExtras();    textView.setText(String.format("parameter=%s,age=%d,name1=%s",bundle.getString("parameter"),    bundle.getInt("age"),bundle.getString("name1","leo")));}

2、使用Intent.putExtra与Bundle

MainActivity.java

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    findViewById(R.id.btnStart).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(MainActivity.this,AnotherActivity.class);//              intent.putExtra("parameter","start new activity");                Bundle bundle = new Bundle();                bundle.putString("parameter","get bundle data");                bundle.putInt("age",56);                bundle.putString("name1","wgt");//              intent.putExtras(bundle);                intent.putExtra("bundle",bundle);                startActivity(intent);            }      });}

AnotherActivity.java

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_another);    textView = (TextView) findViewById(R.id.textView);    Intent intent = getIntent();//  Bundle bundle = intent.getExtras();    Bundle bundle = intent.getBundleExtra("bundle");    textView.setText(String.format("parameter=%s,age=%d,name1=%s", bundle.getString("parameter"),    bundle.getInt("age"), bundle.getString("name1", "leo")));}

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